161339457 has 16 divisors (see below), whose sum is σ = 225060480. Its totient is φ = 102613632.

The previous prime is 161339447. The next prime is 161339461. The reversal of 161339457 is 754933161.

It is not a de Polignac number, because 161339457 - 2¹⁴ = 161323073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161339447) 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 15 ways as a sum of consecutive naturals, for example, 25363 + ... + 31079.

It is an arithmetic number, because the mean of its divisors is an integer number (14066280).

Almost surely, 2^161339457 is an apocalyptic number.

It is an amenable number.

161339457 is a deficient number, since it is larger than the sum of its proper divisors (63721023).

161339457 is a wasteful number, since it uses less digits than its factorization.

161339457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6152.

The product of its digits is 68040, while the sum is 39.

The square root of 161339457 is about 12701.9469767434. The cubic root of 161339457 is about 544.3942510887.

The spelling of 161339457 in words is "one hundred sixty-one million, three hundred thirty-nine thousand, four hundred fifty-seven".