12945501 has 20 divisors (see below), whose sum is σ = 19619424. Its totient is φ = 8505000.

The previous prime is 12945469. The next prime is 12945511. The reversal of 12945501 is 10554921.

It is not a de Polignac number, because 12945501 - 2⁵ = 12945469 is a prime.

It is a super-2 number, since 2×12945501² = 335171992282002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12945511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4626 + ... + 6876.

Almost surely, 2^12945501 is an apocalyptic number.

It is an amenable number.

12945501 is a deficient number, since it is larger than the sum of its proper divisors (6673923).

12945501 is an equidigital number, since it uses as much as digits as its factorization.

12945501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334 (or 2325 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 12945501 is about 3597.9856864640. The cubic root of 12945501 is about 234.8044306206.

The spelling of 12945501 in words is "twelve million, nine hundred forty-five thousand, five hundred one".