8261409 has 16 divisors (see below), whose sum is σ = 12488000. Its totient is φ = 4815936.

The previous prime is 8261399. The next prime is 8261411. The reversal of 8261409 is 9041628.

It is not a de Polignac number, because 8261409 - 2¹² = 8257313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8261419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4834 + ... + 6315.

It is an arithmetic number, because the mean of its divisors is an integer number (780500).

Almost surely, 2^8261409 is an apocalyptic number.

It is an amenable number.

8261409 is a deficient number, since it is larger than the sum of its proper divisors (4226591).

8261409 is a wasteful number, since it uses less digits than its factorization.

8261409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11184.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 8261409 is about 2874.2666890878. The cubic root of 8261409 is about 202.1551025867.

The spelling of 8261409 in words is "eight million, two hundred sixty-one thousand, four hundred nine".