137604021 has 8 divisors (see below), whose sum is σ = 183526464. Its totient is φ = 91708800.

The previous prime is 137603993. The next prime is 137604029. The reversal of 137604021 is 120406731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137604021 - 2¹¹ = 137601973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137603982 and 137604000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137604029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14725 + ... + 22181.

It is an arithmetic number, because the mean of its divisors is an integer number (22940808).

Almost surely, 2^137604021 is an apocalyptic number.

It is an amenable number.

137604021 is a deficient number, since it is larger than the sum of its proper divisors (45922443).

137604021 is an equidigital number, since it uses as much as digits as its factorization.

137604021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13611.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 137604021 is about 11730.4740313425. The cubic root of 137604021 is about 516.2701810534.

The spelling of 137604021 in words is "one hundred thirty-seven million, six hundred four thousand, twenty-one".