1525045321 has 2 divisors, whose sum is σ = 1525045322. Its totient is φ = 1525045320.

The previous prime is 1525045303. The next prime is 1525045339. The reversal of 1525045321 is 1235405251.

It is a balanced prime because it is at equal distance from previous prime (1525045303) and next prime (1525045339).

It can be written as a sum of positive squares in only one way, i.e., 874030096 + 651015225 = 29564^2 + 25515^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525045321 - 2¹⁷ = 1524914249 is a prime.

It is a super-2 number, since 2×1525045321² = 4651526462207986082, 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 1525045321.

It is not a weakly prime, because it can be changed into another prime (1525045351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762522660 + 762522661.

It is an arithmetic number, because the mean of its divisors is an integer number (762522661).

Almost surely, 2^1525045321 is an apocalyptic number.

It is an amenable number.

1525045321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525045321 is an equidigital number, since it uses as much as digits as its factorization.

1525045321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1525045321 is about 39051.8286511656. The cubic root of 1525045321 is about 1151.0501613227.

The spelling of 1525045321 in words is "one billion, five hundred twenty-five million, forty-five thousand, three hundred twenty-one".