1245772 has 24 divisors (see below), whose sum is σ = 2483712. Its totient is φ = 541200.

The previous prime is 1245767. The next prime is 1245779. The reversal of 1245772 is 2775421.

It is a self number, because there is not a number n which added to its sum of digits gives 1245772.

It is not an unprimeable number, because it can be changed into a prime (1245779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (103488).

2^1245772 is an apocalyptic number.

It is an amenable number.

1245772 is a deficient number, since it is larger than the sum of its proper divisors (1237940).

1245772 is a wasteful number, since it uses less digits than its factorization.

1245772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1267 counting only the distinct ones).

The product of its digits is 3920, while the sum is 28.

The square root of 1245772 is about 1116.1415680818. The cubic root of 1245772 is about 107.6001446449.

The spelling of 1245772 in words is "one million, two hundred forty-five thousand, seven hundred seventy-two".