1651626 has 12 divisors (see below), whose sum is σ = 3578562. Its totient is φ = 550536.

The previous prime is 1651621. The next prime is 1651667. The reversal of 1651626 is 6261561.

It is a happy number.

1651626 is a `hidden beast` number, since 1 + 651 + 6 + 2 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1010025 + 641601 = 1005^2 + 801^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1651626.

It is not an unprimeable number, because it can be changed into a prime (1651621) 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 5 ways as a sum of consecutive naturals, for example, 45861 + ... + 45896.

2^1651626 is an apocalyptic number.

1651626 is an abundant number, since it is smaller than the sum of its proper divisors (1926936).

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

1651626 is a wasteful number, since it uses less digits than its factorization.

1651626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91765 (or 91762 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1651626 is about 1285.1560216565. The cubic root of 1651626 is about 118.2053782328.

Adding to 1651626 its sum of digits (27), we get a triangular number (1651653 = T₁₈₁₇).

The spelling of 1651626 in words is "one million, six hundred fifty-one thousand, six hundred twenty-six".