161457 has 4 divisors (see below), whose sum is σ = 215280. Its totient is φ = 107636.

The previous prime is 161453. The next prime is 161459. The reversal of 161457 is 754161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 754161 = 3 ⋅251387.

It is a cyclic number.

It is not a de Polignac number, because 161457 - 2² = 161453 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161457.

It is not an unprimeable number, because it can be changed into a prime (161453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26907 + ... + 26912.

It is an arithmetic number, because the mean of its divisors is an integer number (53820).

2¹⁶¹⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

161457 is a deficient number, since it is larger than the sum of its proper divisors (53823).

161457 is an equidigital number, since it uses as much as digits as its factorization.

161457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53822.

The product of its digits is 840, while the sum is 24.

The square root of 161457 is about 401.8171225819. The cubic root of 161457 is about 54.4526424171.

Subtracting 161457 from its reverse (754161), we obtain a cube (592704 = 84³).

The spelling of 161457 in words is "one hundred sixty-one thousand, four hundred fifty-seven".