149540139 has 24 divisors (see below), whose sum is σ = 248133600. Its totient is φ = 85010688.

The previous prime is 149540123. The next prime is 149540159. The reversal of 149540139 is 931045941.

It is a happy number.

It is not a de Polignac number, because 149540139 - 2⁴ = 149540123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149540159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6387 + ... + 18435.

It is an arithmetic number, because the mean of its divisors is an integer number (10338900).

Almost surely, 2^149540139 is an apocalyptic number.

149540139 is a deficient number, since it is larger than the sum of its proper divisors (98593461).

149540139 is a wasteful number, since it uses less digits than its factorization.

149540139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12259 (or 12256 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 149540139 is about 12228.6605562506. The cubic root of 149540139 is about 530.7857562932.

The spelling of 149540139 in words is "one hundred forty-nine million, five hundred forty thousand, one hundred thirty-nine".