651404 has 12 divisors (see below), whose sum is σ = 1227744. Its totient is φ = 300624.

The previous prime is 651401. The next prime is 651437. The reversal of 651404 is 404156.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 651404.

It is not an unprimeable number, because it can be changed into a prime (651401) 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, 6212 + ... + 6315.

It is an arithmetic number, because the mean of its divisors is an integer number (102312).

2⁶⁵¹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

651404 is a deficient number, since it is larger than the sum of its proper divisors (576340).

651404 is a wasteful number, since it uses less digits than its factorization.

651404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12544 (or 12542 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 651404 is about 807.0960289829. The cubic root of 651404 is about 86.6862348976.

The spelling of 651404 in words is "six hundred fifty-one thousand, four hundred four".