137380121 has 4 divisors (see below), whose sum is σ = 137914932. Its totient is φ = 136845312.

The previous prime is 137380097. The next prime is 137380123. The reversal of 137380121 is 121083731.

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 98803600 + 38576521 = 9940^2 + 6211^2 .

It is a cyclic number.

It is not a de Polignac number, because 137380121 - 2¹⁰ = 137379097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137380123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267020 + ... + 267533.

It is an arithmetic number, because the mean of its divisors is an integer number (34478733).

Almost surely, 2^137380121 is an apocalyptic number.

It is an amenable number.

137380121 is a deficient number, since it is larger than the sum of its proper divisors (534811).

137380121 is an equidigital number, since it uses as much as digits as its factorization.

137380121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534810.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 137380121 is about 11720.9266271912. The cubic root of 137380121 is about 515.9900156813.

The spelling of 137380121 in words is "one hundred thirty-seven million, three hundred eighty thousand, one hundred twenty-one".