1520481279 has 4 divisors (see below), whose sum is σ = 2027308376. Its totient is φ = 1013654184.

The previous prime is 1520481253. The next prime is 1520481283. The reversal of 1520481279 is 9721840251.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1520481279 - 2¹⁷ = 1520350207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520481229) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 253413544 + ... + 253413549.

It is an arithmetic number, because the mean of its divisors is an integer number (506827094).

Almost surely, 2^1520481279 is an apocalyptic number.

1520481279 is a deficient number, since it is larger than the sum of its proper divisors (506827097).

1520481279 is an equidigital number, since it uses as much as digits as its factorization.

1520481279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506827096.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 1520481279 is about 38993.3491636715. The cubic root of 1520481279 is about 1149.9007548884.

The spelling of 1520481279 in words is "one billion, five hundred twenty million, four hundred eighty-one thousand, two hundred seventy-nine".