1520012106 has 24 divisors (see below), whose sum is σ = 3373687044. Its totient is φ = 494312640.

The previous prime is 1520012089. The next prime is 1520012113. The reversal of 1520012106 is 6012100251.

It can be written as a sum of positive squares in 2 ways, for example, as 1098325881 + 421686225 = 33141^2 + 20535^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1029081 + ... + 1030556.

Almost surely, 2^1520012106 is an apocalyptic number.

1520012106 is an abundant number, since it is smaller than the sum of its proper divisors (1853674938).

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

1520012106 is a wasteful number, since it uses less digits than its factorization.

1520012106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059686 (or 2059683 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1520012106 is about 38987.3326351009. The cubic root of 1520012106 is about 1149.7824682435.

Adding to 1520012106 its reverse (6012100251), we get a palindrome (7532112357).

The spelling of 1520012106 in words is "one billion, five hundred twenty million, twelve thousand, one hundred six".