1525990243 has 2 divisors, whose sum is σ = 1525990244. Its totient is φ = 1525990242.

The previous prime is 1525990229. The next prime is 1525990247. The reversal of 1525990243 is 3420995251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1525990243 - 2⁵ = 1525990211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1525990196 and 1525990205.

It is not a weakly prime, because it can be changed into another prime (1525990247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762995121 + 762995122.

It is an arithmetic number, because the mean of its divisors is an integer number (762995122).

Almost surely, 2^1525990243 is an apocalyptic number.

1525990243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525990243 is an equidigital number, since it uses as much as digits as its factorization.

1525990243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 1525990243 is about 39063.9250844049. The cubic root of 1525990243 is about 1151.2878434527.

The spelling of 1525990243 in words is "one billion, five hundred twenty-five million, nine hundred ninety thousand, two hundred forty-three".