420402553 has 12 divisors (see below), whose sum is σ = 434160720. Its totient is φ = 406904336.

The previous prime is 420402539. The next prime is 420402557. The reversal of 420402553 is 355204024.

It is not a de Polignac number, because 420402553 - 2⁹ = 420402041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420402557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1434675 + ... + 1434967.

It is an arithmetic number, because the mean of its divisors is an integer number (36180060).

Almost surely, 2^420402553 is an apocalyptic number.

It is an amenable number.

420402553 is a deficient number, since it is larger than the sum of its proper divisors (13758167).

420402553 is an frugal number, since it uses more digits than its factorization.

420402553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 420402553 is about 20503.7204672713. The cubic root of 420402553 is about 749.1264216911.

Adding to 420402553 its reverse (355204024), we get a palindrome (775606577).

The spelling of 420402553 in words is "four hundred twenty million, four hundred two thousand, five hundred fifty-three".