1042251320 has 128 divisors (see below), whose sum is σ = 2643840000. Its totient is φ = 366528000.

The previous prime is 1042251311. The next prime is 1042251347. The reversal of 1042251320 is 231522401.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1042251292 and 1042251301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2088431 + ... + 2088929.

It is an arithmetic number, because the mean of its divisors is an integer number (20655000).

Almost surely, 2^1042251320 is an apocalyptic number.

1042251320 is a gapful number since it is divisible by the number (10) 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 1042251320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1321920000).

1042251320 is an abundant number, since it is smaller than the sum of its proper divisors (1601588680).

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

1042251320 is a wasteful number, since it uses less digits than its factorization.

1042251320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1042251320 is about 32283.9173583380. The cubic root of 1042251320 is about 1013.8899493739.

Adding to 1042251320 its reverse (231522401), we get a palindrome (1273773721).

The spelling of 1042251320 in words is "one billion, forty-two million, two hundred fifty-one thousand, three hundred twenty".