401581427 has 8 divisors (see below), whose sum is σ = 433589520. Its totient is φ = 369732960.

The previous prime is 401581399. The next prime is 401581501. The reversal of 401581427 is 724185104.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 401581427 - 2¹⁸ = 401319283 is a prime.

It is a super-2 number, since 2×401581427² = 322535285022712658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401581393 and 401581402.

It is not an unprimeable number, because it can be changed into a prime (401581627) 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, 34649 + ... + 44762.

It is an arithmetic number, because the mean of its divisors is an integer number (54198690).

Almost surely, 2^401581427 is an apocalyptic number.

401581427 is a deficient number, since it is larger than the sum of its proper divisors (32008093).

401581427 is a wasteful number, since it uses less digits than its factorization.

401581427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79813.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 401581427 is about 20039.4966753160. The cubic root of 401581427 is about 737.7760273675.

The spelling of 401581427 in words is "four hundred one million, five hundred eighty-one thousand, four hundred twenty-seven".