451661425 has 6 divisors (see below), whose sum is σ = 560060198. Its totient is φ = 361329120.

The previous prime is 451661401. The next prime is 451661443. The reversal of 451661425 is 524166154.

It can be written as a sum of positive squares in 3 ways, for example, as 7969329 + 443692096 = 2823^2 + 21064^2 .

It is a de Polignac number, because none of the positive numbers 2^k-451661425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9033204 + ... + 9033253.

Almost surely, 2^451661425 is an apocalyptic number.

It is an amenable number.

451661425 is a deficient number, since it is larger than the sum of its proper divisors (108398773).

451661425 is a wasteful number, since it uses less digits than its factorization.

451661425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18066467 (or 18066462 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 451661425 is about 21252.3275195918. The cubic root of 451661425 is about 767.2513597925.

The spelling of 451661425 in words is "four hundred fifty-one million, six hundred sixty-one thousand, four hundred twenty-five".