137901545 has 4 divisors (see below), whose sum is σ = 165481860. Its totient is φ = 110321232.

The previous prime is 137901527. The next prime is 137901581. The reversal of 137901545 is 545109731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545109731 = 349 ⋅1561919.

It can be written as a sum of positive squares in 2 ways, for example, as 13980121 + 123921424 = 3739^2 + 11132^2 .

It is a cyclic number.

It is not a de Polignac number, because 137901545 - 2⁶ = 137901481 is a prime.

It is a super-2 number, since 2×137901545² = 38033672226774050, which contains 22 as substring.

It is an unprimeable number.

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, 13790150 + ... + 13790159.

It is an arithmetic number, because the mean of its divisors is an integer number (41370465).

Almost surely, 2^137901545 is an apocalyptic number.

It is an amenable number.

137901545 is a deficient number, since it is larger than the sum of its proper divisors (27580315).

137901545 is an equidigital number, since it uses as much as digits as its factorization.

137901545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27580314.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 137901545 is about 11743.1488536934. The cubic root of 137901545 is about 516.6420020599.

The spelling of 137901545 in words is "one hundred thirty-seven million, nine hundred one thousand, five hundred forty-five".