421204040 has 32 divisors (see below), whose sum is σ = 951696000. Its totient is φ = 167772864.

The previous prime is 421204031. The next prime is 421204057. The reversal of 421204040 is 40402124.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12470 + ... + 31589.

It is an arithmetic number, because the mean of its divisors is an integer number (29740500).

Almost surely, 2^421204040 is an apocalyptic number.

421204040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421204040 is an abundant number, since it is smaller than the sum of its proper divisors (530491960).

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

421204040 is a wasteful number, since it uses less digits than its factorization.

421204040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44309 (or 44305 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 421204040 is about 20523.2560769484. The cubic root of 421204040 is about 749.6021831003.

Adding to 421204040 its reverse (40402124), we get a palindrome (461606164).

The spelling of 421204040 in words is "four hundred twenty-one million, two hundred four thousand, forty".