421415667 has 12 divisors (see below), whose sum is σ = 620197344. Its totient is φ = 275642640.

The previous prime is 421415653. The next prime is 421415689. The reversal of 421415667 is 766514124.

It is not a de Polignac number, because 421415667 - 2⁸ = 421415411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421415167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 441259 + ... + 442212.

It is an arithmetic number, because the mean of its divisors is an integer number (51683112).

Almost surely, 2^421415667 is an apocalyptic number.

421415667 is a deficient number, since it is larger than the sum of its proper divisors (198781677).

421415667 is a wasteful number, since it uses less digits than its factorization.

421415667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883530 (or 883527 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 421415667 is about 20528.4112147044. The cubic root of 421415667 is about 749.7277038184.

It can be divided in two parts, 4214 and 15667, that added together give a square (19881 = 141²).

The spelling of 421415667 in words is "four hundred twenty-one million, four hundred fifteen thousand, six hundred sixty-seven".