1520401473 has 12 divisors (see below), whose sum is σ = 2271864660. Its totient is φ = 978649056.

The previous prime is 1520401427. The next prime is 1520401517. The reversal of 1520401473 is 3741040251.

1520401473 is a `hidden beast` number, since 152 + 0 + 40 + 1 + 473 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 520387344 + 1000014129 = 22812^2 + 31623^2 .

It is not a de Polignac number, because 1520401473 - 2⁸ = 1520401217 is a prime.

It is a super-3 number, since 3×1520401473³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1520401573) 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 in 11 ways as a sum of consecutive naturals, for example, 2912386 + ... + 2912907.

It is an arithmetic number, because the mean of its divisors is an integer number (189322055).

Almost surely, 2^1520401473 is an apocalyptic number.

It is an amenable number.

1520401473 is a deficient number, since it is larger than the sum of its proper divisors (751463187).

1520401473 is a wasteful number, since it uses less digits than its factorization.

1520401473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825328 (or 5825325 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1520401473 is about 38992.3258218845. The cubic root of 1520401473 is about 1149.8806361303.

The spelling of 1520401473 in words is "one billion, five hundred twenty million, four hundred one thousand, four hundred seventy-three".