634457 has 4 divisors (see below), whose sum is σ = 671796. Its totient is φ = 597120.

The previous prime is 634441. The next prime is 634471. The reversal of 634457 is 754436.

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 512656 + 121801 = 716^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 634457 - 2⁴ = 634441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18644 + ... + 18677.

It is an arithmetic number, because the mean of its divisors is an integer number (167949).

2⁶³⁴⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

634457 is a deficient number, since it is larger than the sum of its proper divisors (37339).

634457 is a wasteful number, since it uses less digits than its factorization.

634457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37338.

The product of its digits is 10080, while the sum is 29.

The square root of 634457 is about 796.5280911556. The cubic root of 634457 is about 85.9278735443.

The spelling of 634457 in words is "six hundred thirty-four thousand, four hundred fifty-seven".