635426 has 16 divisors (see below), whose sum is σ = 1101600. Its totient is φ = 271680.

The previous prime is 635423. The next prime is 635431. The reversal of 635426 is 624536.

635426 = 98² + 99² + ... + 141².

It is a junction number, because it is equal to n+sod(n) for n = 635395 and 635404.

It is not an unprimeable number, because it can be changed into a prime (635423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (68850).

2⁶³⁵⁴²⁶ is an apocalyptic number.

635426 is a deficient number, since it is larger than the sum of its proper divisors (466174).

635426 is a wasteful number, since it uses less digits than its factorization.

635426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729.

The product of its digits is 4320, while the sum is 26.

The square root of 635426 is about 797.1361238835. The cubic root of 635426 is about 85.9715968940.

The spelling of 635426 in words is "six hundred thirty-five thousand, four hundred twenty-six".