406252249 has 8 divisors (see below), whose sum is σ = 437761800. Its totient is φ = 374779776.

The previous prime is 406252237. The next prime is 406252277. The reversal of 406252249 is 942252604.

It can be written as a sum of positive squares in 4 ways, for example, as 62520649 + 343731600 = 7907^2 + 18540^2 .

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 406252249 - 2¹⁵ = 406219481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406252549) 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, 16077 + ... + 32725.

It is an arithmetic number, because the mean of its divisors is an integer number (54720225).

Almost surely, 2^406252249 is an apocalyptic number.

It is an amenable number.

406252249 is a deficient number, since it is larger than the sum of its proper divisors (31509551).

406252249 is a wasteful number, since it uses less digits than its factorization.

406252249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18539.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 406252249 is about 20155.7001614928. The cubic root of 406252249 is about 740.6253837975.

The spelling of 406252249 in words is "four hundred six million, two hundred fifty-two thousand, two hundred forty-nine".