421490007 has 8 divisors (see below), whose sum is σ = 624429680. Its totient is φ = 280993320.

The previous prime is 421489997. The next prime is 421490021. The reversal of 421490007 is 700094124.

It is a happy number.

It is not a de Polignac number, because 421490007 - 2²⁶ = 354381143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 15610741 = 421490007 / (4 + 2 + 1 + 4 + 9 + 0 + 0 + 0 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421490057) 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, 7805344 + ... + 7805397.

It is an arithmetic number, because the mean of its divisors is an integer number (78053710).

Almost surely, 2^421490007 is an apocalyptic number.

421490007 is a deficient number, since it is larger than the sum of its proper divisors (202939673).

421490007 is a wasteful number, since it uses less digits than its factorization.

421490007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15610750 (or 15610744 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 421490007 is about 20530.2217961716. The cubic root of 421490007 is about 749.7717865652.

The spelling of 421490007 in words is "four hundred twenty-one million, four hundred ninety thousand, seven".