1521125512 has 16 divisors (see below), whose sum is σ = 2869191360. Its totient is φ = 756007824.

The previous prime is 1521125477. The next prime is 1521125519. The reversal of 1521125512 is 2155211251.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1521125519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567948 + ... + 570619.

It is an arithmetic number, because the mean of its divisors is an integer number (179324460).

Almost surely, 2^1521125512 is an apocalyptic number.

It is an amenable number.

1521125512 is a deficient number, since it is larger than the sum of its proper divisors (1348065848).

1521125512 is a wasteful number, since it uses less digits than its factorization.

1521125512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138740 (or 1138736 counting only the distinct ones).

The product of its digits is 1000, while the sum is 25.

The square root of 1521125512 is about 39001.6090950104. The cubic root of 1521125512 is about 1150.0631375543.

Adding to 1521125512 its reverse (2155211251), we get a palindrome (3676336763).

The spelling of 1521125512 in words is "one billion, five hundred twenty-one million, one hundred twenty-five thousand, five hundred twelve".