1252200400 has 60 divisors (see below), whose sum is σ = 3281914944. Its totient is φ = 455344000.

The previous prime is 1252200379. The next prime is 1252200401. The reversal of 1252200400 is 40022521.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252200401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137896 + ... + 146695.

Almost surely, 2^1252200400 is an apocalyptic number.

1252200400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252200400 is an abundant number, since it is smaller than the sum of its proper divisors (2029714544).

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

1252200400 is a wasteful number, since it uses less digits than its factorization.

1252200400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284620 (or 284609 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1252200400 is about 35386.4437320282. The cubic root of 1252200400 is about 1077.8490569014.

Adding to 1252200400 its reverse (40022521), we get a palindrome (1292222921).

The spelling of 1252200400 in words is "one billion, two hundred fifty-two million, two hundred thousand, four hundred".