1245223772 has 54 divisors (see below), whose sum is σ = 2470987512. Its totient is φ = 547788384.

The previous prime is 1245223757. The next prime is 1245223807. The reversal of 1245223772 is 2773225421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4399943 + ... + 4400225.

It is an arithmetic number, because the mean of its divisors is an integer number (45759028).

Almost surely, 2^1245223772 is an apocalyptic number.

It is an amenable number.

1245223772 is a deficient number, since it is larger than the sum of its proper divisors (1225763740).

1245223772 is a wasteful number, since it uses less digits than its factorization.

1245223772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619 (or 321 counting only the distinct ones).

The product of its digits is 47040, while the sum is 35.

The square root of 1245223772 is about 35287.7283485350. The cubic root of 1245223772 is about 1075.8435843168.

The spelling of 1245223772 in words is "one billion, two hundred forty-five million, two hundred twenty-three thousand, seven hundred seventy-two".