1520054243 has 4 divisors (see below), whose sum is σ = 1526110488. Its totient is φ = 1513998000.

The previous prime is 1520054219. The next prime is 1520054251. The reversal of 1520054243 is 3424500251.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1520054243 - 2⁸ = 1520053987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1520054203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3027746 + ... + 3028247.

It is an arithmetic number, because the mean of its divisors is an integer number (381527622).

Almost surely, 2^1520054243 is an apocalyptic number.

1520054243 is a deficient number, since it is larger than the sum of its proper divisors (6056245).

1520054243 is an equidigital number, since it uses as much as digits as its factorization.

1520054243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056244.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1520054243 is about 38987.8730248266. The cubic root of 1520054243 is about 1149.7930927063.

Adding to 1520054243 its reverse (3424500251), we get a palindrome (4944554494).

The spelling of 1520054243 in words is "one billion, five hundred twenty million, fifty-four thousand, two hundred forty-three".