421861907 has 8 divisors (see below), whose sum is σ = 429989472. Its totient is φ = 413795200.

The previous prime is 421861903. The next prime is 421861933. The reversal of 421861907 is 709168124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421861907 - 2² = 421861903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421861903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094 + ... + 29067.

It is an arithmetic number, because the mean of its divisors is an integer number (53748684).

Almost surely, 2^421861907 is an apocalyptic number.

421861907 is a deficient number, since it is larger than the sum of its proper divisors (8127565).

421861907 is a wasteful number, since it uses less digits than its factorization.

421861907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30429.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 421861907 is about 20539.2771781287. The cubic root of 421861907 is about 749.9922411049.

The spelling of 421861907 in words is "four hundred twenty-one million, eight hundred sixty-one thousand, nine hundred seven".