1520450645 has 24 divisors (see below), whose sum is σ = 2190901248. Its totient is φ = 1008957600.

The previous prime is 1520450629. The next prime is 1520450663. The reversal of 1520450645 is 5460540251.

It is not a de Polignac number, because 1520450645 - 2⁴ = 1520450629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92501 + ... + 107690.

It is an arithmetic number, because the mean of its divisors is an integer number (91287552).

Almost surely, 2^1520450645 is an apocalyptic number.

It is an amenable number.

1520450645 is a deficient number, since it is larger than the sum of its proper divisors (670450603).

1520450645 is a wasteful number, since it uses less digits than its factorization.

1520450645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200241 (or 200234 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 1520450645 is about 38992.9563511155. The cubic root of 1520450645 is about 1149.8930322687.

Adding to 1520450645 its reverse (5460540251), we get a palindrome (6980990896).

The spelling of 1520450645 in words is "one billion, five hundred twenty million, four hundred fifty thousand, six hundred forty-five".