2520145409 has 8 divisors (see below), whose sum is σ = 2532969120. Its totient is φ = 2507349600.

The previous prime is 2520145379. The next prime is 2520145417. The reversal of 2520145409 is 9045410252.

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

It is a cyclic number.

It is not a de Polignac number, because 2520145409 - 2¹⁶ = 2520079873 is a prime.

It is a super-2 number, since 2×2520145409² = 12702265765007554562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2520145429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187682 + ... + 200660.

It is an arithmetic number, because the mean of its divisors is an integer number (316621140).

Almost surely, 2^2520145409 is an apocalyptic number.

It is an amenable number.

2520145409 is a deficient number, since it is larger than the sum of its proper divisors (12823711).

2520145409 is a wasteful number, since it uses less digits than its factorization.

2520145409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13951.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2520145409 is about 50201.0498794597. The cubic root of 2520145409 is about 1360.8445966616.

The spelling of 2520145409 in words is "two billion, five hundred twenty million, one hundred forty-five thousand, four hundred nine".