1279740492 has 48 divisors (see below), whose sum is σ = 3335270400. Its totient is φ = 424339920.

The previous prime is 1279740463. The next prime is 1279740499. The reversal of 1279740492 is 2940479721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1279740499) 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, 10392 + ... + 51647.

It is an arithmetic number, because the mean of its divisors is an integer number (69484800).

Almost surely, 2^1279740492 is an apocalyptic number.

1279740492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1279740492 is an abundant number, since it is smaller than the sum of its proper divisors (2055529908).

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

1279740492 is a wasteful number, since it uses less digits than its factorization.

1279740492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62243 (or 62235 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 1279740492 is about 35773.4607216020. The cubic root of 1279740492 is about 1085.6936653154.

The spelling of 1279740492 in words is "one billion, two hundred seventy-nine million, seven hundred forty thousand, four hundred ninety-two".