1255122700 has 72 divisors (see below), whose sum is σ = 3001471088. Its totient is φ = 452632320.

The previous prime is 1255122689. The next prime is 1255122703. The reversal of 1255122700 is 72215521.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1255122703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44674 + ... + 67126.

Almost surely, 2^1255122700 is an apocalyptic number.

1255122700 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 1255122700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500735544).

1255122700 is an abundant number, since it is smaller than the sum of its proper divisors (1746348388).

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

1255122700 is a wasteful number, since it uses less digits than its factorization.

1255122700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22523 (or 22516 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 1255122700 is about 35427.7109054480. The cubic root of 1255122700 is about 1078.6868757280.

The spelling of 1255122700 in words is "one billion, two hundred fifty-five million, one hundred twenty-two thousand, seven hundred".