1520143445 has 8 divisors (see below), whose sum is σ = 1836415800. Its totient is φ = 1207952320.

The previous prime is 1520143433. The next prime is 1520143453. The reversal of 1520143445 is 5443410251.

It can be written as a sum of positive squares in 4 ways, for example, as 5299204 + 1514844241 = 2302^2 + 38921^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1520143445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019486 + ... + 1020975.

It is an arithmetic number, because the mean of its divisors is an integer number (229551975).

Almost surely, 2^1520143445 is an apocalyptic number.

It is an amenable number.

1520143445 is a deficient number, since it is larger than the sum of its proper divisors (316272355).

1520143445 is a wasteful number, since it uses less digits than its factorization.

1520143445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040615.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1520143445 is about 38989.0169791443. The cubic root of 1520143445 is about 1149.8155835347.

Adding to 1520143445 its reverse (5443410251), we get a palindrome (6963553696).

The spelling of 1520143445 in words is "one billion, five hundred twenty million, one hundred forty-three thousand, four hundred forty-five".