1251724 has 6 divisors (see below), whose sum is σ = 2190524. Its totient is φ = 625860.

The previous prime is 1251721. The next prime is 1251743. The reversal of 1251724 is 4271521.

1251724 = T₉₁₂ + T₉₁₃ + T₉₁₄.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1251695 and 1251704.

It is not an unprimeable number, because it can be changed into a prime (1251721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156462 + ... + 156469.

2^1251724 is an apocalyptic number.

1251724 is the 914-th centered triangular number.

It is an amenable number.

1251724 is a deficient number, since it is larger than the sum of its proper divisors (938800).

1251724 is a wasteful number, since it uses less digits than its factorization.

1251724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312935 (or 312933 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The square root of 1251724 is about 1118.8047193322. The cubic root of 1251724 is about 107.7712350236.

It can be divided in two parts, 125 and 1724, that added together give a square (1849 = 43²).

The spelling of 1251724 in words is "one million, two hundred fifty-one thousand, seven hundred twenty-four".