421145856 has 54 divisors (see below), whose sum is σ = 1214273970. Its totient is φ = 140381184.

The previous prime is 421145821. The next prime is 421145863. The reversal of 421145856 is 658541124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 337971456 + 83174400 = 18384^2 + 9120^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 421145856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89091 + ... + 93698.

It is an arithmetic number, because the mean of its divisors is an integer number (22486555).

Almost surely, 2^421145856 is an apocalyptic number.

It is an amenable number.

421145856 is an abundant number, since it is smaller than the sum of its proper divisors (793128114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421145856 is a wasteful number, since it uses less digits than its factorization.

421145856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182811 (or 182794 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 421145856 is about 20521.8385141293. The cubic root of 421145856 is about 749.5676654971.

The spelling of 421145856 in words is "four hundred twenty-one million, one hundred forty-five thousand, eight hundred fifty-six".