405244513 has 4 divisors (see below), whose sum is σ = 414668848. Its totient is φ = 395820180.

The previous prime is 405244471. The next prime is 405244517. The reversal of 405244513 is 315442504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405244513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405244517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4712103 + ... + 4712188.

It is an arithmetic number, because the mean of its divisors is an integer number (103667212).

Almost surely, 2^405244513 is an apocalyptic number.

405244513 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

405244513 is a deficient number, since it is larger than the sum of its proper divisors (9424335).

405244513 is an equidigital number, since it uses as much as digits as its factorization.

405244513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9424334.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 405244513 is about 20130.6858551814. The cubic root of 405244513 is about 740.0124863975.

The spelling of 405244513 in words is "four hundred five million, two hundred forty-four thousand, five hundred thirteen".