630457 has 4 divisors (see below), whose sum is σ = 645876. Its totient is φ = 615040.

The previous prime is 630451. The next prime is 630467. The reversal of 630457 is 754036.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 379456 + 251001 = 616^2 + 501^2 .

It is a cyclic number.

It is not a de Polignac number, because 630457 - 2¹⁵ = 597689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630451) 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, 7648 + ... + 7729.

It is an arithmetic number, because the mean of its divisors is an integer number (161469).

2⁶³⁰⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

630457 is a deficient number, since it is larger than the sum of its proper divisors (15419).

630457 is a wasteful number, since it uses less digits than its factorization.

630457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15418.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 630457 is about 794.0132240712. The cubic root of 630457 is about 85.7469123148.

The spelling of 630457 in words is "six hundred thirty thousand, four hundred fifty-seven".