1325749812 has 48 divisors (see below), whose sum is σ = 3182858112. Its totient is φ = 429183360.

The previous prime is 1325749781. The next prime is 1325749829. The reversal of 1325749812 is 2189475231.

It is a super-2 number, since 2×1325749812² = 3515225128036070688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269737 + ... + 274607.

It is an arithmetic number, because the mean of its divisors is an integer number (66309544).

Almost surely, 2^1325749812 is an apocalyptic number.

1325749812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1325749812 is an abundant number, since it is smaller than the sum of its proper divisors (1857108300).

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

1325749812 is a wasteful number, since it uses less digits than its factorization.

1325749812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5528 (or 5526 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 1325749812 is about 36410.8474496269. The cubic root of 1325749812 is about 1098.5517613315.

The spelling of 1325749812 in words is "one billion, three hundred twenty-five million, seven hundred forty-nine thousand, eight hundred twelve".