420021137 has 8 divisors (see below), whose sum is σ = 421863552. Its totient is φ = 418183600.

The previous prime is 420021127. The next prime is 420021143. The reversal of 420021137 is 731120024.

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 420021137 - 2⁶ = 420021073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420021127) 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, 353258 + ... + 354444.

It is an arithmetic number, because the mean of its divisors is an integer number (52732944).

Almost surely, 2^420021137 is an apocalyptic number.

It is an amenable number.

420021137 is a deficient number, since it is larger than the sum of its proper divisors (1842415).

420021137 is a wasteful number, since it uses less digits than its factorization.

420021137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 420021137 is about 20494.4172154272. The cubic root of 420021137 is about 748.8998013917.

The spelling of 420021137 in words is "four hundred twenty million, twenty-one thousand, one hundred thirty-seven".