425502781 has 4 divisors (see below), whose sum is σ = 464184864. Its totient is φ = 386820700.

The previous prime is 425502773. The next prime is 425502827. The reversal of 425502781 is 187205524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 425502781 - 2³ = 425502773 is a prime.

It is a super-2 number, since 2×425502781² = 362105233277467922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425502281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19341025 + ... + 19341046.

It is an arithmetic number, because the mean of its divisors is an integer number (116046216).

Almost surely, 2^425502781 is an apocalyptic number.

It is an amenable number.

425502781 is a deficient number, since it is larger than the sum of its proper divisors (38682083).

425502781 is a wasteful number, since it uses less digits than its factorization.

425502781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38682082.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 425502781 is about 20627.7187541424. The cubic root of 425502781 is about 752.1436632545.

The spelling of 425502781 in words is "four hundred twenty-five million, five hundred two thousand, seven hundred eighty-one".