149261138 has 24 divisors (see below), whose sum is σ = 244362096. Its totient is φ = 68343600.

The previous prime is 149261137. The next prime is 149261159. The reversal of 149261138 is 831162941.

149261138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 149261098 and 149261107.

It is not an unprimeable number, because it can be changed into a prime (149261137) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 42593 + ... + 45963.

It is an arithmetic number, because the mean of its divisors is an integer number (10181754).

Almost surely, 2^149261138 is an apocalyptic number.

149261138 is a deficient number, since it is larger than the sum of its proper divisors (95100958).

149261138 is a wasteful number, since it uses less digits than its factorization.

149261138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3530 (or 3517 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 149261138 is about 12217.2475623604. The cubic root of 149261138 is about 530.4554504375.

The spelling of 149261138 in words is "one hundred forty-nine million, two hundred sixty-one thousand, one hundred thirty-eight".