1239121632 has 192 divisors, whose sum is σ = 3953940480. Its totient is φ = 331900416.

The previous prime is 1239121627. The next prime is 1239121661. The reversal of 1239121632 is 2361219321.

It is a self number, because there is not a number n which added to its sum of digits gives 1239121632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1365723 + ... + 1366629.

It is an arithmetic number, because the mean of its divisors is an integer number (20593440).

Almost surely, 2^1239121632 is an apocalyptic number.

1239121632 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 1239121632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1976970240).

1239121632 is an abundant number, since it is smaller than the sum of its proper divisors (2714818848).

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

1239121632 is a wasteful number, since it uses less digits than its factorization.

1239121632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 1045 counting only the distinct ones).

The product of its digits is 3888, while the sum is 30.

The square root of 1239121632 is about 35201.1595263565. The cubic root of 1239121632 is about 1074.0833381367.

The spelling of 1239121632 in words is "one billion, two hundred thirty-nine million, one hundred twenty-one thousand, six hundred thirty-two".