1520021242 has 16 divisors (see below), whose sum is σ = 2422470240. Its totient is φ = 713279088.

The previous prime is 1520021203. The next prime is 1520021267. The reversal of 1520021242 is 2421200251.

It is a super-2 number, since 2×1520021242² = 4620929152262445128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182853 + ... + 190984.

It is an arithmetic number, because the mean of its divisors is an integer number (151404390).

Almost surely, 2^1520021242 is an apocalyptic number.

1520021242 is a deficient number, since it is larger than the sum of its proper divisors (902448998).

1520021242 is a wasteful number, since it uses less digits than its factorization.

1520021242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373965.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1520021242 is about 38987.4498011860. The cubic root of 1520021242 is about 1149.7847718198.

Adding to 1520021242 its reverse (2421200251), we get a palindrome (3941221493).

The spelling of 1520021242 in words is "one billion, five hundred twenty million, twenty-one thousand, two hundred forty-two".