1520404145 has 32 divisors (see below), whose sum is σ = 2035138560. Its totient is φ = 1082833920.

The previous prime is 1520404091. The next prime is 1520404147. The reversal of 1520404145 is 5414040251.

It is not a de Polignac number, because 1520404145 - 2¹⁴ = 1520387761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1520404147) 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 31 ways as a sum of consecutive naturals, for example, 677936 + ... + 680174.

It is an arithmetic number, because the mean of its divisors is an integer number (63598080).

Almost surely, 2^1520404145 is an apocalyptic number.

It is an amenable number.

1520404145 is a deficient number, since it is larger than the sum of its proper divisors (514734415).

1520404145 is a wasteful number, since it uses less digits than its factorization.

1520404145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1520404145 is about 38992.3600850218. The cubic root of 1520404145 is about 1149.8813097417.

Adding to 1520404145 its reverse (5414040251), we get a palindrome (6934444396).

The spelling of 1520404145 in words is "one billion, five hundred twenty million, four hundred four thousand, one hundred forty-five".