405245297 has 4 divisors (see below), whose sum is σ = 405485796. Its totient is φ = 405004800.

The previous prime is 405245263. The next prime is 405245311. The reversal of 405245297 is 792542504.

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

It can be written as a sum of positive squares in 2 ways, for example, as 169806961 + 235438336 = 13031^2 + 15344^2 .

It is a cyclic number.

It is not a de Polignac number, because 405245297 - 2¹² = 405241201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 405245297.

It is not an unprimeable number, because it can be changed into a prime (405215297) 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, 117704 + ... + 121097.

It is an arithmetic number, because the mean of its divisors is an integer number (101371449).

Almost surely, 2^405245297 is an apocalyptic number.

It is an amenable number.

405245297 is a deficient number, since it is larger than the sum of its proper divisors (240499).

405245297 is a wasteful number, since it uses less digits than its factorization.

405245297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240498.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 405245297 is about 20130.7053279313. The cubic root of 405245297 is about 740.0129636151.

The spelling of 405245297 in words is "four hundred five million, two hundred forty-five thousand, two hundred ninety-seven".