161461457 has 2 divisors, whose sum is σ = 161461458. Its totient is φ = 161461456.

The previous prime is 161461439. The next prime is 161461481. The reversal of 161461457 is 754164161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152794321 + 8667136 = 12361^2 + 2944^2 .

It is a cyclic number.

It is not a de Polignac number, because 161461457 - 2¹⁰ = 161460433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161460457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80730728 + 80730729.

It is an arithmetic number, because the mean of its divisors is an integer number (80730729).

Almost surely, 2^161461457 is an apocalyptic number.

It is an amenable number.

161461457 is a deficient number, since it is larger than the sum of its proper divisors (1).

161461457 is an equidigital number, since it uses as much as digits as its factorization.

161461457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 161461457 is about 12706.7484825977. The cubic root of 161461457 is about 544.5314346524.

The spelling of 161461457 in words is "one hundred sixty-one million, four hundred sixty-one thousand, four hundred fifty-seven".