1292449872 has 60 divisors (see below), whose sum is σ = 3883950816. Its totient is φ = 369270720.

The previous prime is 1292449859. The next prime is 1292449903. The reversal of 1292449872 is 2789442921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272404 + ... + 277107.

Almost surely, 2^1292449872 is an apocalyptic number.

1292449872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1292449872 is an abundant number, since it is smaller than the sum of its proper divisors (2591500944).

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

1292449872 is a wasteful number, since it uses less digits than its factorization.

1292449872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549536 (or 549523 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 1292449872 is about 35950.6588534897. The cubic root of 1292449872 is about 1089.2759189575.

The spelling of 1292449872 in words is "one billion, two hundred ninety-two million, four hundred forty-nine thousand, eight hundred seventy-two".