409149261 has 6 divisors (see below), whose sum is σ = 590993390. Its totient is φ = 272766168.

The previous prime is 409149229. The next prime is 409149263. The reversal of 409149261 is 162941904.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 344844900 + 64304361 = 18570^2 + 8019^2 .

It is not a de Polignac number, because 409149261 - 2⁵ = 409149229 is a prime.

It is a super-2 number, since 2×409149261² = 334806235553692242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409149263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22730506 + ... + 22730523.

Almost surely, 2^409149261 is an apocalyptic number.

It is an amenable number.

409149261 is a deficient number, since it is larger than the sum of its proper divisors (181844129).

409149261 is a wasteful number, since it uses less digits than its factorization.

409149261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45461035 (or 45461032 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 409149261 is about 20227.4383202619. The cubic root of 409149261 is about 742.3816986641.

The spelling of 409149261 in words is "four hundred nine million, one hundred forty-nine thousand, two hundred sixty-one".