1521244979 has 2 divisors, whose sum is σ = 1521244980. Its totient is φ = 1521244978.

The previous prime is 1521244961. The next prime is 1521245003. The reversal of 1521244979 is 9794421251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1521244979 - 2¹² = 1521240883 is a prime.

It is a super-2 number, since 2×1521244979² = 4628372572265420882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1521244079) by changing a digit.

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 as a sum of consecutive naturals, namely, 760622489 + 760622490.

It is an arithmetic number, because the mean of its divisors is an integer number (760622490).

Almost surely, 2^1521244979 is an apocalyptic number.

1521244979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521244979 is an equidigital number, since it uses as much as digits as its factorization.

1521244979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 1521244979 is about 39003.1406299544. The cubic root of 1521244979 is about 1150.0932448652.

The spelling of 1521244979 in words is "one billion, five hundred twenty-one million, two hundred forty-four thousand, nine hundred seventy-nine".