405413251 has 4 divisors (see below), whose sum is σ = 410297832. Its totient is φ = 400528672.

The previous prime is 405413237. The next prime is 405413303. The reversal of 405413251 is 152314504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405413251 - 2⁹ = 405412739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405413201) 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, 2442166 + ... + 2442331.

It is an arithmetic number, because the mean of its divisors is an integer number (102574458).

Almost surely, 2^405413251 is an apocalyptic number.

405413251 is a deficient number, since it is larger than the sum of its proper divisors (4884581).

405413251 is an equidigital number, since it uses as much as digits as its factorization.

405413251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884580.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 405413251 is about 20134.8764833559. The cubic root of 405413251 is about 740.1151823386.

Adding to 405413251 its reverse (152314504), we get a palindrome (557727755).

The spelling of 405413251 in words is "four hundred five million, four hundred thirteen thousand, two hundred fifty-one".