1253915368 has 8 divisors (see below), whose sum is σ = 2351091330. Its totient is φ = 626957680.

The previous prime is 1253915293. The next prime is 1253915387. The reversal of 1253915368 is 8635193521.

It can be written as a sum of positive squares in only one way, i.e., 971070244 + 282845124 = 31162^2 + 16818^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78369703 + ... + 78369718.

Almost surely, 2^1253915368 is an apocalyptic number.

It is an amenable number.

1253915368 is a deficient number, since it is larger than the sum of its proper divisors (1097175962).

1253915368 is a wasteful number, since it uses less digits than its factorization.

1253915368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156739427 (or 156739423 counting only the distinct ones).

The product of its digits is 194400, while the sum is 43.

The square root of 1253915368 is about 35410.6674322866. The cubic root of 1253915368 is about 1078.3408933556.

The spelling of 1253915368 in words is "one billion, two hundred fifty-three million, nine hundred fifteen thousand, three hundred sixty-eight".