1520773042 has 4 divisors (see below), whose sum is σ = 2281159566. Its totient is φ = 760386520.

The previous prime is 1520773039. The next prime is 1520773073. The reversal of 1520773042 is 2403770251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2403770251 = 38971 ⋅61681.

It can be written as a sum of positive squares in only one way, i.e., 1487722041 + 33051001 = 38571^2 + 5749^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1520772995 and 1520773013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380193259 + ... + 380193262.

Almost surely, 2^1520773042 is an apocalyptic number.

1520773042 is a deficient number, since it is larger than the sum of its proper divisors (760386524).

1520773042 is an equidigital number, since it uses as much as digits as its factorization.

1520773042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760386523.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 1520773042 is about 38997.0901734988. The cubic root of 1520773042 is about 1149.9743011270.

The spelling of 1520773042 in words is "one billion, five hundred twenty million, seven hundred seventy-three thousand, forty-two".