421449907 has 16 divisors (see below), whose sum is σ = 467292672. Its totient is φ = 378069120.

The previous prime is 421449863. The next prime is 421449913. The reversal of 421449907 is 709944124.

It is a de Polignac number, because none of the positive numbers 2^k-421449907 is a prime.

It is a super-2 number, since 2×421449907² = 355240048220617298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421449907.

It is not an unprimeable number, because it can be changed into a prime (421449107) 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, 118282 + ... + 121792.

It is an arithmetic number, because the mean of its divisors is an integer number (29205792).

Almost surely, 2^421449907 is an apocalyptic number.

421449907 is a deficient number, since it is larger than the sum of its proper divisors (45842765).

421449907 is a wasteful number, since it uses less digits than its factorization.

421449907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3858.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 421449907 is about 20529.2451639119. The cubic root of 421449907 is about 749.7480083802.

The spelling of 421449907 in words is "four hundred twenty-one million, four hundred forty-nine thousand, nine hundred seven".