421491156 has 48 divisors (see below), whose sum is σ = 997054464. Its totient is φ = 138571776.

The previous prime is 421491143. The next prime is 421491157. The reversal of 421491156 is 651194124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421491157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293416 + ... + 294848.

It is an arithmetic number, because the mean of its divisors is an integer number (20771968).

Almost surely, 2^421491156 is an apocalyptic number.

It is an amenable number.

421491156 is an abundant number, since it is smaller than the sum of its proper divisors (575563308).

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

421491156 is a wasteful number, since it uses less digits than its factorization.

421491156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760 (or 1758 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 421491156 is about 20530.2497792891. The cubic root of 421491156 is about 749.7724678680.

The spelling of 421491156 in words is "four hundred twenty-one million, four hundred ninety-one thousand, one hundred fifty-six".