401325621 has 16 divisors (see below), whose sum is σ = 551916288. Its totient is φ = 259256000.

The previous prime is 401325607. The next prime is 401325679. The reversal of 401325621 is 126523104.

It is a cyclic number.

It is not a de Polignac number, because 401325621 - 2⁶ = 401325557 is a prime.

It is a super-2 number, since 2×401325621² = 322124508142071282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401325591 and 401325600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401325601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151 + ... + 28331.

It is an arithmetic number, because the mean of its divisors is an integer number (34494768).

Almost surely, 2^401325621 is an apocalyptic number.

It is an amenable number.

401325621 is a deficient number, since it is larger than the sum of its proper divisors (150590667).

401325621 is a wasteful number, since it uses less digits than its factorization.

401325621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28332.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 401325621 is about 20033.1131130436. The cubic root of 401325621 is about 737.6193404884.

Adding to 401325621 its reverse (126523104), we get a palindrome (527848725).

It can be divided in two parts, 40132 and 5621, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 401325621 in words is "four hundred one million, three hundred twenty-five thousand, six hundred twenty-one".