1251626 has 8 divisors (see below), whose sum is σ = 1909440. Its totient is φ = 615148.

The previous prime is 1251583. The next prime is 1251641. The reversal of 1251626 is 6261521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5186 + ... + 5421.

It is an arithmetic number, because the mean of its divisors is an integer number (238680).

2^1251626 is an apocalyptic number.

1251626 is a deficient number, since it is larger than the sum of its proper divisors (657814).

1251626 is a wasteful number, since it uses less digits than its factorization.

1251626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10668.

The product of its digits is 720, while the sum is 23.

The square root of 1251626 is about 1118.7609217344. The cubic root of 1251626 is about 107.7684224076.

It can be divided in two parts, 1251 and 626, that multiplied together give a triangular number (783126 = T₁₂₅₁).

The spelling of 1251626 in words is "one million, two hundred fifty-one thousand, six hundred twenty-six".