154991412 has 36 divisors (see below), whose sum is σ = 392997696. Its totient is φ = 51503760.

The previous prime is 154991401. The next prime is 154991437. The reversal of 154991412 is 214199451.

It is a happy number.

154991412 is a `hidden beast` number, since 154 + 9 + 91 + 412 = 666.

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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5413 + ... + 18419.

Almost surely, 2^154991412 is an apocalyptic number.

154991412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

154991412 is an abundant number, since it is smaller than the sum of its proper divisors (238006284).

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

154991412 is a wasteful number, since it uses less digits than its factorization.

154991412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13348 (or 13343 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 154991412 is about 12449.5546908313. The cubic root of 154991412 is about 537.1586144438.

It can be divided in two parts, 154991 and 412, that added together give a triangular number (155403 = T₅₅₇).

The spelling of 154991412 in words is "one hundred fifty-four million, nine hundred ninety-one thousand, four hundred twelve".