1273213392 has 160 divisors (see below), whose sum is σ = 3809756160. Its totient is φ = 362588160.

The previous prime is 1273213387. The next prime is 1273213399. The reversal of 1273213392 is 2933123721.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273213399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 715608 + ... + 717384.

It is an arithmetic number, because the mean of its divisors is an integer number (23810976).

Almost surely, 2^1273213392 is an apocalyptic number.

1273213392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1273213392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904878080).

1273213392 is an abundant number, since it is smaller than the sum of its proper divisors (2536542768).

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

1273213392 is a wasteful number, since it uses less digits than its factorization.

1273213392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881 (or 1875 counting only the distinct ones).

The product of its digits is 13608, while the sum is 33.

The square root of 1273213392 is about 35682.1158565464. The cubic root of 1273213392 is about 1083.8447193414.

The spelling of 1273213392 in words is "one billion, two hundred seventy-three million, two hundred thirteen thousand, three hundred ninety-two".