420867487 has 16 divisors (see below), whose sum is σ = 457283232. Its totient is φ = 385873920.

The previous prime is 420867457. The next prime is 420867511. The reversal of 420867487 is 784768024.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420867487 is a prime.

It is a super-2 number, since 2×420867487² = 354258883227390338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420867437) 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, 109063 + ... + 112855.

It is an arithmetic number, because the mean of its divisors is an integer number (28580202).

Almost surely, 2^420867487 is an apocalyptic number.

420867487 is a deficient number, since it is larger than the sum of its proper divisors (36415745).

420867487 is a wasteful number, since it uses less digits than its factorization.

420867487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978.

The product of its (nonzero) digits is 602112, while the sum is 46.

The square root of 420867487 is about 20515.0551303183. The cubic root of 420867487 is about 749.4024793444.

The spelling of 420867487 in words is "four hundred twenty million, eight hundred sixty-seven thousand, four hundred eighty-seven".