1072235521 has 4 divisors (see below), whose sum is σ = 1225412032. Its totient is φ = 919059012.

The previous prime is 1072235453. The next prime is 1072235537. The reversal of 1072235521 is 1255322701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1072235521 - 2²¹ = 1070138369 is a prime.

It is a super-2 number, since 2×1072235521² = 2299378024988282882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1072235521.

It is not an unprimeable number, because it can be changed into a prime (1072235561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76588245 + ... + 76588258.

It is an arithmetic number, because the mean of its divisors is an integer number (306353008).

Almost surely, 2^1072235521 is an apocalyptic number.

It is an amenable number.

1072235521 is a deficient number, since it is larger than the sum of its proper divisors (153176511).

1072235521 is an equidigital number, since it uses as much as digits as its factorization.

1072235521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153176510.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 1072235521 is about 32745.0075736745. The cubic root of 1072235521 is about 1023.5209350828.

The spelling of 1072235521 in words is "one billion, seventy-two million, two hundred thirty-five thousand, five hundred twenty-one".