1251265204 has 24 divisors (see below), whose sum is σ = 2588826240. Its totient is φ = 517764576.

The previous prime is 1251265199. The next prime is 1251265207. The reversal of 1251265204 is 4025621521.

It is a super-2 number, since 2×1251265204² = 3131329221482323232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251265207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769672 + ... + 771295.

It is an arithmetic number, because the mean of its divisors is an integer number (107867760).

Almost surely, 2^1251265204 is an apocalyptic number.

1251265204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1251265204 is an abundant number, since it is smaller than the sum of its proper divisors (1337561036).

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

1251265204 is a wasteful number, since it uses less digits than its factorization.

1251265204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541007 (or 1541005 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1251265204 is about 35373.2272205972. The cubic root of 1251265204 is about 1077.5806623830.

Adding to 1251265204 its reverse (4025621521), we get a palindrome (5276886725).

The spelling of 1251265204 in words is "one billion, two hundred fifty-one million, two hundred sixty-five thousand, two hundred four".