421118903 has 4 divisors (see below), whose sum is σ = 421254960. Its totient is φ = 420982848.

The previous prime is 421118861. The next prime is 421118923. The reversal of 421118903 is 309811124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421118903 - 2⁶ = 421118839 is a prime.

It is a super-2 number, since 2×421118903² = 354682260927846818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421118923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63275 + ... + 69612.

It is an arithmetic number, because the mean of its divisors is an integer number (105313740).

Almost surely, 2^421118903 is an apocalyptic number.

421118903 is a deficient number, since it is larger than the sum of its proper divisors (136057).

421118903 is a wasteful number, since it uses less digits than its factorization.

421118903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136056.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 421118903 is about 20521.1818129463. The cubic root of 421118903 is about 749.5516745777.

The spelling of 421118903 in words is "four hundred twenty-one million, one hundred eighteen thousand, nine hundred three".