403221042 has 48 divisors (see below), whose sum is σ = 1025449152. Its totient is φ = 112091040.

The previous prime is 403221031. The next prime is 403221083. The reversal of 403221042 is 240122304.

403221042 is a `hidden beast` number, since 403 + 221 + 0 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38584 + ... + 47907.

It is an arithmetic number, because the mean of its divisors is an integer number (21363524).

Almost surely, 2^403221042 is an apocalyptic number.

403221042 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

403221042 is an abundant number, since it is smaller than the sum of its proper divisors (622228110).

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

403221042 is a wasteful number, since it uses less digits than its factorization.

403221042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86543 (or 86540 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 403221042 is about 20080.3645883236. The cubic root of 403221042 is about 738.7787514041.

Adding to 403221042 its reverse (240122304), we get a palindrome (643343346).

It can be divided in two parts, 403 and 221042, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 403221042 in words is "four hundred three million, two hundred twenty-one thousand, forty-two".