1520135450 has 12 divisors (see below), whose sum is σ = 2827452030. Its totient is φ = 608054160.

The previous prime is 1520135447. The next prime is 1520135467. The reversal of 1520135450 is 545310251.

1520135450 = 4465² + 4466² + ... + 4539².

It can be written as a sum of positive squares in 3 ways, for example, as 1179991201 + 340144249 = 34351^2 + 18443^2 .

It is a Curzon number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 15201305 + ... + 15201404.

Almost surely, 2^1520135450 is an apocalyptic number.

1520135450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1520135450 is a deficient number, since it is larger than the sum of its proper divisors (1307316580).

1520135450 is a wasteful number, since it uses less digits than its factorization.

1520135450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30402721 (or 30402716 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1520135450 is about 38988.9144501357. The cubic root of 1520135450 is about 1149.8135677618.

The spelling of 1520135450 in words is "one billion, five hundred twenty million, one hundred thirty-five thousand, four hundred fifty".