401621401 has 8 divisors (see below), whose sum is σ = 404318304. Its totient is φ = 398933280.

The previous prime is 401621393. The next prime is 401621453. The reversal of 401621401 is 104126104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 401621401 - 2³ = 401621393 is a prime.

It is a super-2 number, since 2×401621401² = 322599499482405602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401621471) 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, 106966 + ... + 110656.

It is an arithmetic number, because the mean of its divisors is an integer number (50539788).

Almost surely, 2^401621401 is an apocalyptic number.

It is an amenable number.

401621401 is a deficient number, since it is larger than the sum of its proper divisors (2696903).

401621401 is a wasteful number, since it uses less digits than its factorization.

401621401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 401621401 is about 20040.4940308367. The cubic root of 401621401 is about 737.8005063220.

Adding to 401621401 its reverse (104126104), we get a palindrome (505747505).

The spelling of 401621401 in words is "four hundred one million, six hundred twenty-one thousand, four hundred one".