401020553 has 4 divisors (see below), whose sum is σ = 401111568. Its totient is φ = 400929540.

The previous prime is 401020519. The next prime is 401020577. The reversal of 401020553 is 355020104.

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 not a de Polignac number, because 401020553 - 2⁸ = 401020297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401020513) 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, 38543 + ... + 47828.

It is an arithmetic number, because the mean of its divisors is an integer number (100277892).

Almost surely, 2^401020553 is an apocalyptic number.

It is an amenable number.

401020553 is a deficient number, since it is larger than the sum of its proper divisors (91015).

401020553 is an equidigital number, since it uses as much as digits as its factorization.

401020553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91014.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 401020553 is about 20025.4975718457. The cubic root of 401020553 is about 737.4323924619.

Adding to 401020553 its reverse (355020104), we get a palindrome (756040657).

The spelling of 401020553 in words is "four hundred one million, twenty thousand, five hundred fifty-three".