1525917969 has 27 divisors (see below), whose sum is σ = 2287823473. Its totient is φ = 980012544.

The previous prime is 1525917959. The next prime is 1525917979. The reversal of 1525917969 is 9697195251.

The square root of 1525917969 is 39063.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1525917959) and next prime (1525917979).

It can be written as a sum of positive squares in 4 ways, for example, as 28227969 + 1497690000 = 5313^2 + 38700^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1525917969 is a prime.

It is a super-2 number, since 2×1525917969² = 4656851296234169922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (1525917959) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3398257 + ... + 3398705.

Almost surely, 2^1525917969 is an apocalyptic number.

1525917969 is the 39063-rd square number.

1525917969 is the 19532-nd centered octagonal number.

It is an amenable number.

1525917969 is a deficient number, since it is larger than the sum of its proper divisors (761905504).

1525917969 is an frugal number, since it uses more digits than its factorization.

1525917969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962 (or 481 counting only the distinct ones).

The product of its digits is 1530900, while the sum is 54.

The cubic root of 1525917969 is about 1151.2696673882.

The spelling of 1525917969 in words is "one billion, five hundred twenty-five million, nine hundred seventeen thousand, nine hundred sixty-nine".