149561172 has 36 divisors (see below), whose sum is σ = 400297716. Its totient is φ = 46920960.

The previous prime is 149561147. The next prime is 149561173. The reversal of 149561172 is 271165941.

149561172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 103917636 + 45643536 = 10194^2 + 6756^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149561173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121579 + ... + 122802.

It is an arithmetic number, because the mean of its divisors is an integer number (11119381).

Almost surely, 2^149561172 is an apocalyptic number.

149561172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

149561172 is an abundant number, since it is smaller than the sum of its proper divisors (250736544).

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

149561172 is a wasteful number, since it uses less digits than its factorization.

149561172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244408 (or 244403 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 149561172 is about 12229.5205139041. The cubic root of 149561172 is about 530.8106403444.

The spelling of 149561172 in words is "one hundred forty-nine million, five hundred sixty-one thousand, one hundred seventy-two".