149917212 has 18 divisors (see below), whose sum is σ = 378957488. Its totient is φ = 49972392.

The previous prime is 149917181. The next prime is 149917219. The reversal of 149917212 is 212719941.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4164367 = 149917212 / (1 + 4 + 9 + 9 + 1 + 7 + 2 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149917219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2082148 + ... + 2082219.

Almost surely, 2^149917212 is an apocalyptic number.

149917212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

149917212 is an abundant number, since it is smaller than the sum of its proper divisors (229040276).

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

149917212 is a wasteful number, since it uses less digits than its factorization.

149917212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164377 (or 4164372 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 149917212 is about 12244.0684414944. The cubic root of 149917212 is about 531.2315161827.

The spelling of 149917212 in words is "one hundred forty-nine million, nine hundred seventeen thousand, two hundred twelve".