1021292272 has 320 divisors, whose sum is σ = 2927812608. Its totient is φ = 334540800.

The previous prime is 1021292267. The next prime is 1021292273. The reversal of 1021292272 is 2722921201.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1021292272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021292273) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32944897 + ... + 32944927.

Almost surely, 2^1021292272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021292272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463906304).

1021292272 is an abundant number, since it is smaller than the sum of its proper divisors (1906520336).

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

1021292272 is a wasteful number, since it uses less digits than its factorization.

1021292272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1021292272 is about 31957.6637443978. The cubic root of 1021292272 is about 1007.0476381135.

It can be divided in two parts, 102129 and 2272, that added together give a palindrome (104401).

The spelling of 1021292272 in words is "one billion, twenty-one million, two hundred ninety-two thousand, two hundred seventy-two".