11921607 has 32 divisors (see below), whose sum is σ = 19699200. Its totient is φ = 7081344.

The previous prime is 11921593. The next prime is 11921633. The reversal of 11921607 is 70612911.

It is not a de Polignac number, because 11921607 - 2⁶ = 11921543 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11921677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8038 + ... + 9404.

It is an arithmetic number, because the mean of its divisors is an integer number (615600).

Almost surely, 2^11921607 is an apocalyptic number.

11921607 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11921607 is a deficient number, since it is larger than the sum of its proper divisors (7777593).

11921607 is a wasteful number, since it uses less digits than its factorization.

11921607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1406 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 11921607 is about 3452.7680200095. The cubic root of 11921607 is about 228.4432168051.

The spelling of 11921607 in words is "eleven million, nine hundred twenty-one thousand, six hundred seven".