625401 has 20 divisors (see below), whose sum is σ = 1068672. Its totient is φ = 357048.

The previous prime is 625397. The next prime is 625409. The reversal of 625401 is 104526.

It is a happy number.

625401 is a `hidden beast` number, since 625 + 40 + 1 = 666.

It is not a de Polignac number, because 625401 - 2² = 625397 is a prime.

It is a super-2 number, since 2×625401² = 782252821602, which contains 22 as substring.

625401 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625401.

It is not an unprimeable number, because it can be changed into a prime (625409) 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 19 ways as a sum of consecutive naturals, for example, 16 + ... + 1118.

2⁶²⁵⁴⁰¹ is an apocalyptic number.

It is an amenable number.

625401 is a deficient number, since it is larger than the sum of its proper divisors (443271).

625401 is a wasteful number, since it uses less digits than its factorization.

625401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 625401 is about 790.8229890437. The cubic root of 625401 is about 85.5170787674.

Adding to 625401 its reverse (104526), we get a palindrome (729927).

The spelling of 625401 in words is "six hundred twenty-five thousand, four hundred one".