420525251 has 8 divisors (see below), whose sum is σ = 431124144. Its totient is φ = 409963680.

The previous prime is 420525247. The next prime is 420525253. The reversal of 420525251 is 152525024.

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 420525251 - 2² = 420525247 is a prime.

It is a super-2 number, since 2×420525251² = 353682973457226002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420525251.

It is not an unprimeable number, because it can be changed into a prime (420525253) 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, 14225 + ... + 32301.

It is an arithmetic number, because the mean of its divisors is an integer number (53890518).

Almost surely, 2^420525251 is an apocalyptic number.

420525251 is a deficient number, since it is larger than the sum of its proper divisors (10598893).

420525251 is a wasteful number, since it uses less digits than its factorization.

420525251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18661.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 420525251 is about 20506.7123401095. The cubic root of 420525251 is about 749.1992942053.

The spelling of 420525251 in words is "four hundred twenty million, five hundred twenty-five thousand, two hundred fifty-one".