137042621 has 2 divisors, whose sum is σ = 137042622. Its totient is φ = 137042620.

The previous prime is 137042569. The next prime is 137042629. The reversal of 137042621 is 126240731.

137042621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94284100 + 42758521 = 9710^2 + 6539^2 .

It is a cyclic number.

It is not a de Polignac number, because 137042621 - 2¹⁸ = 136780477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137042629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68521310 + 68521311.

It is an arithmetic number, because the mean of its divisors is an integer number (68521311).

Almost surely, 2^137042621 is an apocalyptic number.

It is an amenable number.

137042621 is a deficient number, since it is larger than the sum of its proper divisors (1).

137042621 is an equidigital number, since it uses as much as digits as its factorization.

137042621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 137042621 is about 11706.5204480238. The cubic root of 137042621 is about 515.5671271490.

The spelling of 137042621 in words is "one hundred thirty-seven million, forty-two thousand, six hundred twenty-one".