1293145538 has 8 divisors (see below), whose sum is σ = 1946339388. Its totient is φ = 644365744.

The previous prime is 1293145519. The next prime is 1293145543. The reversal of 1293145538 is 8355413921.

It can be written as a sum of positive squares in 2 ways, for example, as 1228712809 + 64432729 = 35053^2 + 8027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1293145495 and 1293145504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1102781 + ... + 1103952.

Almost surely, 2^1293145538 is an apocalyptic number.

1293145538 is a deficient number, since it is larger than the sum of its proper divisors (653193850).

1293145538 is a wasteful number, since it uses less digits than its factorization.

1293145538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207028.

The product of its digits is 129600, while the sum is 41.

The square root of 1293145538 is about 35960.3328405064. The cubic root of 1293145538 is about 1089.4713195222.

The spelling of 1293145538 in words is "one billion, two hundred ninety-three million, one hundred forty-five thousand, five hundred thirty-eight".