1293685945 has 16 divisors (see below), whose sum is σ = 1663706880. Its totient is φ = 963192384.

The previous prime is 1293685919. The next prime is 1293685963. The reversal of 1293685945 is 5495863921.

It is a cyclic number.

It is not a de Polignac number, because 1293685945 - 2¹⁵ = 1293653177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1293685892 and 1293685901.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147765 + ... + 156274.

It is an arithmetic number, because the mean of its divisors is an integer number (103981680).

Almost surely, 2^1293685945 is an apocalyptic number.

It is an amenable number.

1293685945 is a deficient number, since it is larger than the sum of its proper divisors (370020935).

1293685945 is a wasteful number, since it uses less digits than its factorization.

1293685945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304104.

The product of its digits is 2332800, while the sum is 52.

The square root of 1293685945 is about 35967.8459877708. The cubic root of 1293685945 is about 1089.6230621567.

The spelling of 1293685945 in words is "one billion, two hundred ninety-three million, six hundred eighty-five thousand, nine hundred forty-five".