651456 has 112 divisors (see below), whose sum is σ = 2133600. Its totient is φ = 193536.

The previous prime is 651439. The next prime is 651461. The reversal of 651456 is 654156.

It is a happy number.

651456 is a `hidden beast` number, since 651 + 4 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 651456.

It is an unprimeable number.

651456 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22450 + ... + 22478.

It is an arithmetic number, because the mean of its divisors is an integer number (19050).

2⁶⁵¹⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1066800).

651456 is an abundant number, since it is smaller than the sum of its proper divisors (1482144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651456 is a wasteful number, since it uses less digits than its factorization.

651456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 47 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 651456 is about 807.1282425984. The cubic root of 651456 is about 86.6885414868.

It can be divided in two parts, 65 and 1456, that added together give a square (1521 = 39²).

The spelling of 651456 in words is "six hundred fifty-one thousand, four hundred fifty-six".