425673261 has 12 divisors (see below), whose sum is σ = 662158588. Its totient is φ = 261952704.

The previous prime is 425673257. The next prime is 425673323. The reversal of 425673261 is 162376524.

425673261 is a `hidden beast` number, since 4 + 2 + 567 + 32 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 173054025 + 252619236 = 13155^2 + 15894^2 .

It is not a de Polignac number, because 425673261 - 2² = 425673257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425673221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1819000 + ... + 1819233.

Almost surely, 2^425673261 is an apocalyptic number.

It is an amenable number.

425673261 is a deficient number, since it is larger than the sum of its proper divisors (236485327).

425673261 is a wasteful number, since it uses less digits than its factorization.

425673261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638252 (or 3638249 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 425673261 is about 20631.8506440891. The cubic root of 425673261 is about 752.2440999899.

The spelling of 425673261 in words is "four hundred twenty-five million, six hundred seventy-three thousand, two hundred sixty-one".