420745251 has 8 divisors (see below), whose sum is σ = 561159760. Its totient is φ = 280413792.

The previous prime is 420745249. The next prime is 420745301. The reversal of 420745251 is 152547024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420745251 - 2¹ = 420745249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420745201) 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, 7780 + ... + 30033.

It is an arithmetic number, because the mean of its divisors is an integer number (70144970).

Almost surely, 2^420745251 is an apocalyptic number.

420745251 is a deficient number, since it is larger than the sum of its proper divisors (140414509).

420745251 is a wasteful number, since it uses less digits than its factorization.

420745251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41525.

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 420745251 is about 20512.0757360146. The cubic root of 420745251 is about 749.3299206142.

The spelling of 420745251 in words is "four hundred twenty million, seven hundred forty-five thousand, two hundred fifty-one".