1525353257 has 2 divisors, whose sum is σ = 1525353258. Its totient is φ = 1525353256.

The previous prime is 1525353241. The next prime is 1525353293. The reversal of 1525353257 is 7523535251.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1401454096 + 123899161 = 37436^2 + 11131^2 .

It is an emirp because it is prime and its reverse (7523535251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1525353257 - 2⁴ = 1525353241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1525353257.

It is not a weakly prime, because it can be changed into another prime (1525353757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762676628 + 762676629.

It is an arithmetic number, because the mean of its divisors is an integer number (762676629).

Almost surely, 2^1525353257 is an apocalyptic number.

It is an amenable number.

1525353257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525353257 is an equidigital number, since it uses as much as digits as its factorization.

1525353257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157500, while the sum is 38.

The square root of 1525353257 is about 39055.7711100421. The cubic root of 1525353257 is about 1151.1276291688.

The spelling of 1525353257 in words is "one billion, five hundred twenty-five million, three hundred fifty-three thousand, two hundred fifty-seven".