1521530142 has 32 divisors (see below), whose sum is σ = 3366468864. Its totient is φ = 454574400.

The previous prime is 1521530117. The next prime is 1521530147. The reversal of 1521530142 is 2410351251.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521530147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157663 + ... + 167034.

It is an arithmetic number, because the mean of its divisors is an integer number (105202152).

Almost surely, 2^1521530142 is an apocalyptic number.

1521530142 is an abundant number, since it is smaller than the sum of its proper divisors (1844938722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1521530142 is a wasteful number, since it uses less digits than its factorization.

1521530142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324784.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1521530142 is about 39006.7961001670. The cubic root of 1521530142 is about 1150.1651034534.

Adding to 1521530142 its reverse (2410351251), we get a palindrome (3931881393).

The spelling of 1521530142 in words is "one billion, five hundred twenty-one million, five hundred thirty thousand, one hundred forty-two".