425450257 has 4 divisors (see below), whose sum is σ = 425494080. Its totient is φ = 425406436.

The previous prime is 425450209. The next prime is 425450269. The reversal of 425450257 is 752054524.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425450257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425450287) 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, 133 + ... + 29170.

It is an arithmetic number, because the mean of its divisors is an integer number (106373520).

Almost surely, 2^425450257 is an apocalyptic number.

It is an amenable number.

425450257 is a deficient number, since it is larger than the sum of its proper divisors (43823).

425450257 is a wasteful number, since it uses less digits than its factorization.

425450257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43822.

The product of its (nonzero) digits is 56000, while the sum is 34.

The square root of 425450257 is about 20626.4455735834. The cubic root of 425450257 is about 752.1127138137.

The spelling of 425450257 in words is "four hundred twenty-five million, four hundred fifty thousand, two hundred fifty-seven".