161403542 has 16 divisors (see below), whose sum is σ = 257381712. Its totient is φ = 75648000.

The previous prime is 161403503. The next prime is 161403587. The reversal of 161403542 is 245304161.

It is a super-2 number, since 2×161403542² = 52102206740291528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923 + ... + 17990.

It is an arithmetic number, because the mean of its divisors is an integer number (16086357).

Almost surely, 2^161403542 is an apocalyptic number.

161403542 is a deficient number, since it is larger than the sum of its proper divisors (95978170).

161403542 is a wasteful number, since it uses less digits than its factorization.

161403542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19183.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 161403542 is about 12704.4693710521. The cubic root of 161403542 is about 544.4663204347.

The spelling of 161403542 in words is "one hundred sixty-one million, four hundred three thousand, five hundred forty-two".