1255002120 has 128 divisors (see below), whose sum is σ = 4191264000. Its totient is φ = 334033920.

The previous prime is 1255002113. The next prime is 1255002127. The reversal of 1255002120 is 212005521.

1255002120 is a `hidden beast` number, since 125 + 500 + 21 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1255002113) and next prime (1255002127).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1255002093 and 1255002102.

It is not an unprimeable number, because it can be changed into a prime (1255002127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 950821 + ... + 952139.

It is an arithmetic number, because the mean of its divisors is an integer number (32744250).

Almost surely, 2^1255002120 is an apocalyptic number.

1255002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255002120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2095632000).

1255002120 is an abundant number, since it is smaller than the sum of its proper divisors (2936261880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255002120 is a wasteful number, since it uses less digits than its factorization.

1255002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220 (or 2210 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1255002120 is about 35426.0090893682. The cubic root of 1255002120 is about 1078.6523313686.

Adding to 1255002120 its reverse (212005521), we get a palindrome (1467007641).

The spelling of 1255002120 in words is "one billion, two hundred fifty-five million, two thousand, one hundred twenty".