1525007285 has 4 divisors (see below), whose sum is σ = 1830008748. Its totient is φ = 1220005824.

The previous prime is 1525007269. The next prime is 1525007291. The reversal of 1525007285 is 5827005251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5827005251 = 107 ⋅54457993.

It can be written as a sum of positive squares in 2 ways, for example, as 389115076 + 1135892209 = 19726^2 + 33703^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525007285 - 2⁴ = 1525007269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152500724 + ... + 152500733.

It is an arithmetic number, because the mean of its divisors is an integer number (457502187).

Almost surely, 2^1525007285 is an apocalyptic number.

It is an amenable number.

1525007285 is a deficient number, since it is larger than the sum of its proper divisors (305001463).

1525007285 is an equidigital number, since it uses as much as digits as its factorization.

1525007285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305001462.

The product of its (nonzero) digits is 28000, while the sum is 35.

The square root of 1525007285 is about 39051.3416542889. The cubic root of 1525007285 is about 1151.0405918349.

The spelling of 1525007285 in words is "one billion, five hundred twenty-five million, seven thousand, two hundred eighty-five".