1252615400 has 48 divisors (see below), whose sum is σ = 2914685100. Its totient is φ = 500641280.

The previous prime is 1252615373. The next prime is 1252615423. The reversal of 1252615400 is 45162521.

It can be written as a sum of positive squares in 6 ways, for example, as 393070276 + 859545124 = 19826^2 + 29318^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1252615400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 429146 + ... + 432054.

Almost surely, 2^1252615400 is an apocalyptic number.

1252615400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252615400 is an abundant number, since it is smaller than the sum of its proper divisors (1662069700).

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

1252615400 is a wasteful number, since it uses less digits than its factorization.

1252615400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078 (or 5069 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1252615400 is about 35392.3070737131. The cubic root of 1252615400 is about 1077.9681161065.

Adding to 1252615400 its reverse (45162521), we get a palindrome (1297777921).

The spelling of 1252615400 in words is "one billion, two hundred fifty-two million, six hundred fifteen thousand, four hundred".