1255242400 has 36 divisors (see below), whose sum is σ = 3064362462. Its totient is φ = 502096640.

The previous prime is 1255242349. The next prime is 1255242431. The reversal of 1255242400 is 42425521.

It can be written as a sum of positive squares in 3 ways, for example, as 620807056 + 634435344 = 24916^2 + 25188^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 783727 + ... + 785326.

Almost surely, 2^1255242400 is an apocalyptic number.

1255242400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255242400 is an abundant number, since it is smaller than the sum of its proper divisors (1809120062).

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

1255242400 is a wasteful number, since it uses less digits than its factorization.

1255242400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569073 (or 1569060 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1255242400 is about 35429.4002207206. The cubic root of 1255242400 is about 1078.7211657923.

Adding to 1255242400 its reverse (42425521), we get a palindrome (1297667921).

The spelling of 1255242400 in words is "one billion, two hundred fifty-five million, two hundred forty-two thousand, four hundred".