401400651 has 8 divisors (see below), whose sum is σ = 566683344. Its totient is φ = 251859200.

The previous prime is 401400613. The next prime is 401400661. The reversal of 401400651 is 156004104.

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 401400651 - 2¹⁴ = 401384267 is a prime.

It is a super-2 number, since 2×401400651² = 322244965246447602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401400611) 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, 3935250 + ... + 3935351.

It is an arithmetic number, because the mean of its divisors is an integer number (70835418).

Almost surely, 2^401400651 is an apocalyptic number.

401400651 is a deficient number, since it is larger than the sum of its proper divisors (165282693).

401400651 is a wasteful number, since it uses less digits than its factorization.

401400651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7870621.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 401400651 is about 20034.9856750635. The cubic root of 401400651 is about 737.6653049353.

Adding to 401400651 its reverse (156004104), we get a palindrome (557404755).

The spelling of 401400651 in words is "four hundred one million, four hundred thousand, six hundred fifty-one".