1255464040 has 64 divisors (see below), whose sum is σ = 2923200000. Its totient is φ = 484773120.

The previous prime is 1255464031. The next prime is 1255464043. The reversal of 1255464040 is 404645521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 1255463993 and 1255464011.

It is not an unprimeable number, because it can be changed into a prime (1255464043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617746 + ... + 619774.

It is an arithmetic number, because the mean of its divisors is an integer number (45675000).

Almost surely, 2^1255464040 is an apocalyptic number.

1255464040 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 1255464040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1461600000).

1255464040 is an abundant number, since it is smaller than the sum of its proper divisors (1667735960).

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

1255464040 is a wasteful number, since it uses less digits than its factorization.

1255464040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570 (or 2566 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 1255464040 is about 35432.5279933566. The cubic root of 1255464040 is about 1078.7846525177.

The spelling of 1255464040 in words is "one billion, two hundred fifty-five million, four hundred sixty-four thousand, forty".