405160981 has 2 divisors, whose sum is σ = 405160982. Its totient is φ = 405160980.

The previous prime is 405160969. The next prime is 405161011. The reversal of 405160981 is 189061504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328878225 + 76282756 = 18135^2 + 8734^2 .

It is a cyclic number.

It is not a de Polignac number, because 405160981 - 2⁷ = 405160853 is a prime.

It is a super-2 number, since 2×405160981² = 328310841049764722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405160081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202580490 + 202580491.

It is an arithmetic number, because the mean of its divisors is an integer number (202580491).

Almost surely, 2^405160981 is an apocalyptic number.

It is an amenable number.

405160981 is a deficient number, since it is larger than the sum of its proper divisors (1).

405160981 is an equidigital number, since it uses as much as digits as its factorization.

405160981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 405160981 is about 20128.6110052333. The cubic root of 405160981 is about 739.9616372857.

The spelling of 405160981 in words is "four hundred five million, one hundred sixty thousand, nine hundred eighty-one".