420360921 has 40 divisors (see below), whose sum is σ = 699922080. Its totient is φ = 249858432.

The previous prime is 420360917. The next prime is 420360931. The reversal of 420360921 is 129063024.

It is not a de Polignac number, because 420360921 - 2² = 420360917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (420360931) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18130 + ... + 34196.

It is an arithmetic number, because the mean of its divisors is an integer number (17498052).

Almost surely, 2^420360921 is an apocalyptic number.

It is an amenable number.

420360921 is a deficient number, since it is larger than the sum of its proper divisors (279561159).

420360921 is a wasteful number, since it uses less digits than its factorization.

420360921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16115 (or 16106 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 420360921 is about 20502.7052117519. The cubic root of 420360921 is about 749.1016924877.

The spelling of 420360921 in words is "four hundred twenty million, three hundred sixty thousand, nine hundred twenty-one".