11139645 has 32 divisors (see below), whose sum is σ = 19603584. Its totient is φ = 5356800.

The previous prime is 11139629. The next prime is 11139647. The reversal of 11139645 is 54693111.

11139645 = T₄₄ + T₄₅ + ... + T₄₀₅.

It is not a de Polignac number, because 11139645 - 2⁴ = 11139629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11139647) 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, 29679 + ... + 30051.

It is an arithmetic number, because the mean of its divisors is an integer number (612612).

Almost surely, 2^11139645 is an apocalyptic number.

11139645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11139645 is a deficient number, since it is larger than the sum of its proper divisors (8463939).

11139645 is a wasteful number, since it uses less digits than its factorization.

11139645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573.

The product of its digits is 3240, while the sum is 30.

The square root of 11139645 is about 3337.6106723223. The cubic root of 11139645 is about 223.3351686689.

It can be divided in two parts, 11 and 139645, that added together give a triangular number (139656 = T₅₂₈).

The spelling of 11139645 in words is "eleven million, one hundred thirty-nine thousand, six hundred forty-five".