261434367 has 12 divisors (see below), whose sum is σ = 386410024. Its totient is φ = 170236080.

The previous prime is 261434323. The next prime is 261434387. The reversal of 261434367 is 763434162.

It is a happy number.

261434367 is a `hidden beast` number, since 2 + 614 + 3 + 4 + 36 + 7 = 666.

It is not a de Polignac number, because 261434367 - 2⁸ = 261434111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261434387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337384 + ... + 338157.

Almost surely, 2^261434367 is an apocalyptic number.

261434367 is a deficient number, since it is larger than the sum of its proper divisors (124975657).

261434367 is a wasteful number, since it uses less digits than its factorization.

261434367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675590 (or 675587 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 261434367 is about 16168.9321539797. The cubic root of 261434367 is about 639.4219772961.

The spelling of 261434367 in words is "two hundred sixty-one million, four hundred thirty-four thousand, three hundred sixty-seven".