401352521 has 4 divisors (see below), whose sum is σ = 401568000. Its totient is φ = 401137044.

The previous prime is 401352493. The next prime is 401352529. The reversal of 401352521 is 125253104.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401352521 is a prime.

It is a super-2 number, since 2×401352521² = 322167692226110882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401352529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104921 + ... + 108678.

It is an arithmetic number, because the mean of its divisors is an integer number (100392000).

Almost surely, 2^401352521 is an apocalyptic number.

It is an amenable number.

401352521 is a deficient number, since it is larger than the sum of its proper divisors (215479).

401352521 is a wasteful number, since it uses less digits than its factorization.

401352521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215478.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 401352521 is about 20033.7844902055. The cubic root of 401352521 is about 737.6358204703.

The spelling of 401352521 in words is "four hundred one million, three hundred fifty-two thousand, five hundred twenty-one".