1245921753 has 16 divisors (see below), whose sum is σ = 1734489216. Its totient is φ = 794027520.

The previous prime is 1245921727. The next prime is 1245921763. The reversal of 1245921753 is 3571295421.

It is not a de Polignac number, because 1245921753 - 2⁹ = 1245921241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245921763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139251 + ... + 147927.

It is an arithmetic number, because the mean of its divisors is an integer number (108405576).

Almost surely, 2^1245921753 is an apocalyptic number.

It is an amenable number.

1245921753 is a deficient number, since it is larger than the sum of its proper divisors (488567463).

1245921753 is a wasteful number, since it uses less digits than its factorization.

1245921753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10784.

The product of its digits is 75600, while the sum is 39.

The square root of 1245921753 is about 35297.6168175700. The cubic root of 1245921753 is about 1076.0445597394.

The spelling of 1245921753 in words is "one billion, two hundred forty-five million, nine hundred twenty-one thousand, seven hundred fifty-three".