401322657 has 4 divisors (see below), whose sum is σ = 535096880. Its totient is φ = 267548436.

The previous prime is 401322641. The next prime is 401322671. The reversal of 401322657 is 756223104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 401322657 - 2⁴ = 401322641 is a prime.

It is a super-2 number, since 2×401322657² = 322119750043079298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401322157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66887107 + ... + 66887112.

It is an arithmetic number, because the mean of its divisors is an integer number (133774220).

Almost surely, 2^401322657 is an apocalyptic number.

It is an amenable number.

401322657 is a deficient number, since it is larger than the sum of its proper divisors (133774223).

401322657 is a wasteful number, since it uses less digits than its factorization.

401322657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133774222.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 401322657 is about 20033.0391353883. The cubic root of 401322657 is about 737.6175245821.

The spelling of 401322657 in words is "four hundred one million, three hundred twenty-two thousand, six hundred fifty-seven".