1525510042 has 48 divisors (see below), whose sum is σ = 2737749672. Its totient is φ = 635281920.

The previous prime is 1525510039. The next prime is 1525510043. The reversal of 1525510042 is 2400155251.

It can be written as a sum of positive squares in 4 ways, for example, as 95082001 + 1430428041 = 9751^2 + 37821^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1525509989 and 1525510016.

It is not an unprimeable number, because it can be changed into a prime (1525510043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1257028 + ... + 1258240.

Almost surely, 2^1525510042 is an apocalyptic number.

1525510042 is a deficient number, since it is larger than the sum of its proper divisors (1212239630).

1525510042 is a wasteful number, since it uses less digits than its factorization.

1525510042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583 (or 1576 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1525510042 is about 39057.7782522253. The cubic root of 1525510042 is about 1151.1670677625.

Adding to 1525510042 its reverse (2400155251), we get a palindrome (3925665293).

The spelling of 1525510042 in words is "one billion, five hundred twenty-five million, five hundred ten thousand, forty-two".