1251868 has 6 divisors (see below), whose sum is σ = 2190776. Its totient is φ = 625932.

The previous prime is 1251857. The next prime is 1251869. The reversal of 1251868 is 8681521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156480 + ... + 156487.

2^1251868 is an apocalyptic number.

It is an amenable number.

1251868 is a deficient number, since it is larger than the sum of its proper divisors (938908).

1251868 is a wasteful number, since it uses less digits than its factorization.

1251868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312971 (or 312969 counting only the distinct ones).

The product of its digits is 3840, while the sum is 31.

The square root of 1251868 is about 1118.8690718757. The cubic root of 1251868 is about 107.7753675807.

The spelling of 1251868 in words is "one million, two hundred fifty-one thousand, eight hundred sixty-eight".