1251506 has 8 divisors (see below), whose sum is σ = 1987740. Its totient is φ = 588928.

The previous prime is 1251463. The next prime is 1251527. The reversal of 1251506 is 6051521.

It can be written as a sum of positive squares in 2 ways, for example, as 1243225 + 8281 = 1115^2 + 91^2 .

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

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, 18371 + ... + 18438.

2^1251506 is an apocalyptic number.

1251506 is a deficient number, since it is larger than the sum of its proper divisors (736234).

1251506 is a wasteful number, since it uses less digits than its factorization.

1251506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36828.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1251506 is about 1118.7072896875. The cubic root of 1251506 is about 107.7649781882.

The spelling of 1251506 in words is "one million, two hundred fifty-one thousand, five hundred six".