401581245 has 64 divisors (see below), whose sum is σ = 732856320. Its totient is φ = 186147072.

The previous prime is 401581217. The next prime is 401581273. The reversal of 401581245 is 542185104.

It is an interprime number because it is at equal distance from previous prime (401581217) and next prime (401581273).

It is not a de Polignac number, because 401581245 - 2⁹ = 401580733 is a prime.

It is a super-2 number, since 2×401581245² = 322534992671500050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1048324 + ... + 1048706.

It is an arithmetic number, because the mean of its divisors is an integer number (11450880).

Almost surely, 2^401581245 is an apocalyptic number.

It is an amenable number.

401581245 is a deficient number, since it is larger than the sum of its proper divisors (331275075).

401581245 is a wasteful number, since it uses less digits than its factorization.

401581245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706.

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 401581245 is about 20039.4921342832. The cubic root of 401581245 is about 737.7759159121.

The spelling of 401581245 in words is "four hundred one million, five hundred eighty-one thousand, two hundred forty-five".