400452161 has 8 divisors (see below), whose sum is σ = 402376704. Its totient is φ = 398532960.

The previous prime is 400452131. The next prime is 400452167. The reversal of 400452161 is 161254004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400452161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400452167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240845 + ... + 242501.

It is an arithmetic number, because the mean of its divisors is an integer number (50297088).

Almost surely, 2^400452161 is an apocalyptic number.

It is an amenable number.

400452161 is a deficient number, since it is larger than the sum of its proper divisors (1924543).

400452161 is a wasteful number, since it uses less digits than its factorization.

400452161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 400452161 is about 20011.3008322797. The cubic root of 400452161 is about 737.0838244105.

It can be divided in two parts, 4004 and 52161, that added together give a palindrome (56165).

The spelling of 400452161 in words is "four hundred million, four hundred fifty-two thousand, one hundred sixty-one".