201420990 has 24 divisors (see below), whose sum is σ = 523694808. Its totient is φ = 53712240.

The previous prime is 201420983. The next prime is 201421009. The reversal of 201420990 is 99024102.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1118916 + ... + 1119095.

It is an arithmetic number, because the mean of its divisors is an integer number (21820617).

Almost surely, 2^201420990 is an apocalyptic number.

201420990 is an abundant number, since it is smaller than the sum of its proper divisors (322273818).

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

201420990 is a wasteful number, since it uses less digits than its factorization.

201420990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238024 (or 2238021 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 201420990 is about 14192.2862851621. The cubic root of 201420990 is about 586.1852803989.

The spelling of 201420990 in words is "two hundred one million, four hundred twenty thousand, nine hundred ninety".