1051721832 has 128 divisors (see below), whose sum is σ = 3109155840. Its totient is φ = 290219520.

The previous prime is 1051721807. The next prime is 1051721833. The reversal of 1051721832 is 2381271501.

It is a super-2 number, since 2×1051721832² = 2212237623810872448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1051721832.

It is not an unprimeable number, because it can be changed into a prime (1051721833) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 736303 + ... + 737729.

It is an arithmetic number, because the mean of its divisors is an integer number (24290280).

Almost surely, 2^1051721832 is an apocalyptic number.

1051721832 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 1051721832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1554577920).

1051721832 is an abundant number, since it is smaller than the sum of its proper divisors (2057434008).

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

1051721832 is a wasteful number, since it uses less digits than its factorization.

1051721832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1587 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1051721832 is about 32430.2610535284. The cubic root of 1051721832 is about 1016.9516292067.

The spelling of 1051721832 in words is "one billion, fifty-one million, seven hundred twenty-one thousand, eight hundred thirty-two".