401220501 has 8 divisors (see below), whose sum is σ = 583593504. Its totient is φ = 243163920.

The previous prime is 401220497. The next prime is 401220517. The reversal of 401220501 is 105022104.

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

It is not a de Polignac number, because 401220501 - 2² = 401220497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401220551) 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, 6079066 + ... + 6079131.

It is an arithmetic number, because the mean of its divisors is an integer number (72949188).

Almost surely, 2^401220501 is an apocalyptic number.

It is an amenable number.

401220501 is a deficient number, since it is larger than the sum of its proper divisors (182373003).

401220501 is a wasteful number, since it uses less digits than its factorization.

401220501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12158211.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 401220501 is about 20030.4892850874. The cubic root of 401220501 is about 737.5549328420.

Adding to 401220501 its reverse (105022104), we get a palindrome (506242605).

The spelling of 401220501 in words is "four hundred one million, two hundred twenty thousand, five hundred one".