420012609 has 4 divisors (see below), whose sum is σ = 560016816. Its totient is φ = 280008404.

The previous prime is 420012601. The next prime is 420012611. The reversal of 420012609 is 906210024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420012609 - 2³ = 420012601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420012601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70002099 + ... + 70002104.

It is an arithmetic number, because the mean of its divisors is an integer number (140004204).

Almost surely, 2^420012609 is an apocalyptic number.

It is an amenable number.

420012609 is a deficient number, since it is larger than the sum of its proper divisors (140004207).

420012609 is a wasteful number, since it uses less digits than its factorization.

420012609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140004206.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 420012609 is about 20494.2091577109. The cubic root of 420012609 is about 748.8947328684.

The spelling of 420012609 in words is "four hundred twenty million, twelve thousand, six hundred nine".