1521251242 has 8 divisors (see below), whose sum is σ = 2607859296. Its totient is φ = 651964812.

The previous prime is 1521251203. The next prime is 1521251267. The reversal of 1521251242 is 2421521251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54330388 + ... + 54330415.

It is an arithmetic number, because the mean of its divisors is an integer number (325982412).

Almost surely, 2^1521251242 is an apocalyptic number.

1521251242 is a deficient number, since it is larger than the sum of its proper divisors (1086608054).

1521251242 is a wasteful number, since it uses less digits than its factorization.

1521251242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108660812.

The product of its digits is 1600, while the sum is 25.

The square root of 1521251242 is about 39003.2209182780. The cubic root of 1521251242 is about 1150.0948231830.

Adding to 1521251242 its reverse (2421521251), we get a palindrome (3942772493).

The spelling of 1521251242 in words is "one billion, five hundred twenty-one million, two hundred fifty-one thousand, two hundred forty-two".