1325012100 has 72 divisors (see below), whose sum is σ = 3890980128. Its totient is φ = 348057600.

The previous prime is 1325012099. The next prime is 1325012111. The reversal of 1325012100 is 12105231.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1325012100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12861 + ... + 53060.

Almost surely, 2^1325012100 is an apocalyptic number.

1325012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1325012100 is an abundant number, since it is smaller than the sum of its proper divisors (2565968028).

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

1325012100 is a wasteful number, since it uses less digits than its factorization.

1325012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66005 (or 65998 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1325012100 is about 36400.7156523055. The cubic root of 1325012100 is about 1098.3479608923.

Adding to 1325012100 its reverse (12105231), we get a palindrome (1337117331).

The spelling of 1325012100 in words is "one billion, three hundred twenty-five million, twelve thousand, one hundred".