11139405 has 16 divisors (see below), whose sum is σ = 18305664. Its totient is φ = 5780160.

The previous prime is 11139397. The next prime is 11139407. The reversal of 11139405 is 50493111.

It is not a de Polignac number, because 11139405 - 2³ = 11139397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11139407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9481 + ... + 10590.

It is an arithmetic number, because the mean of its divisors is an integer number (1144104).

Almost surely, 2^11139405 is an apocalyptic number.

11139405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11139405 is a deficient number, since it is larger than the sum of its proper divisors (7166259).

11139405 is a wasteful number, since it uses less digits than its factorization.

11139405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20116.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 11139405 is about 3337.5747182647. The cubic root of 11139405 is about 223.3335647630. Note that the first 3 decimals are identical.

The spelling of 11139405 in words is "eleven million, one hundred thirty-nine thousand, four hundred five".