149139564 has 24 divisors (see below), whose sum is σ = 397705728. Its totient is φ = 42611280.

The previous prime is 149139541. The next prime is 149139581. The reversal of 149139564 is 465931941.

It is a super-2 number, since 2×149139564² = 44485219100220192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 7 ways as a sum of consecutive naturals, for example, 887652 + ... + 887819.

It is an arithmetic number, because the mean of its divisors is an integer number (16571072).

Almost surely, 2^149139564 is an apocalyptic number.

149139564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

149139564 is an abundant number, since it is smaller than the sum of its proper divisors (248566164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149139564 is a wasteful number, since it uses less digits than its factorization.

149139564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775485 (or 1775483 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 149139564 is about 12212.2710418660. The cubic root of 149139564 is about 530.3113917121.

The spelling of 149139564 in words is "one hundred forty-nine million, one hundred thirty-nine thousand, five hundred sixty-four".