1293478512 has 20 divisors (see below), whose sum is σ = 3341486280. Its totient is φ = 431159488.

The previous prime is 1293478489. The next prime is 1293478517. The reversal of 1293478512 is 2158743921.

It is a super-2 number, since 2×1293478512² = 3346173322011468288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1293478517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13473687 + ... + 13473782.

It is an arithmetic number, because the mean of its divisors is an integer number (167074314).

Almost surely, 2^1293478512 is an apocalyptic number.

1293478512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1293478512 is an abundant number, since it is smaller than the sum of its proper divisors (2048007768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1293478512 is a wasteful number, since it uses less digits than its factorization.

1293478512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26947480 (or 26947474 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 1293478512 is about 35964.9622827551. The cubic root of 1293478512 is about 1089.5648213698.

The spelling of 1293478512 in words is "one billion, two hundred ninety-three million, four hundred seventy-eight thousand, five hundred twelve".