137042405 has 4 divisors (see below), whose sum is σ = 164450892. Its totient is φ = 109633920.

The previous prime is 137042393. The next prime is 137042407. The reversal of 137042405 is 504240731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92179201 + 44863204 = 9601^2 + 6698^2 .

It is not a de Polignac number, because 137042405 - 2⁶ = 137042341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137042407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13704236 + ... + 13704245.

It is an arithmetic number, because the mean of its divisors is an integer number (41112723).

Almost surely, 2^137042405 is an apocalyptic number.

It is an amenable number.

137042405 is a deficient number, since it is larger than the sum of its proper divisors (27408487).

137042405 is an equidigital number, since it uses as much as digits as its factorization.

137042405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27408486.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 137042405 is about 11706.5112223924. The cubic root of 137042405 is about 515.5668562782.

The spelling of 137042405 in words is "one hundred thirty-seven million, forty-two thousand, four hundred five".