165021492 has 12 divisors (see below), whose sum is σ = 385050176. Its totient is φ = 55007160.

The previous prime is 165021473. The next prime is 165021497. The reversal of 165021492 is 294120561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165021497) 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 3 ways as a sum of consecutive naturals, for example, 6875884 + ... + 6875907.

Almost surely, 2^165021492 is an apocalyptic number.

165021492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165021492 is an abundant number, since it is smaller than the sum of its proper divisors (220028684).

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

165021492 is a wasteful number, since it uses less digits than its factorization.

165021492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13751798 (or 13751796 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 165021492 is about 12846.0691263904. The cubic root of 165021492 is about 548.5044682422.

The spelling of 165021492 in words is "one hundred sixty-five million, twenty-one thousand, four hundred ninety-two".