401153621 has 8 divisors (see below), whose sum is σ = 443786688. Its totient is φ = 359548000.

The previous prime is 401153563. The next prime is 401153653. The reversal of 401153621 is 126351104.

401153621 = T₃₃₂₆ + T₃₃₂₇ + ... + T₃₃₉₆.

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 401153621 - 2¹⁰ = 401152597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401173621) 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 7 ways as a sum of consecutive naturals, for example, 256040 + ... + 257601.

It is an arithmetic number, because the mean of its divisors is an integer number (55473336).

Almost surely, 2^401153621 is an apocalyptic number.

It is an amenable number.

401153621 is a deficient number, since it is larger than the sum of its proper divisors (42633067).

401153621 is a wasteful number, since it uses less digits than its factorization.

401153621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513723.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 401153621 is about 20028.8197605351. The cubic root of 401153621 is about 737.5139492143.

The spelling of 401153621 in words is "four hundred one million, one hundred fifty-three thousand, six hundred twenty-one".