261425091 has 8 divisors (see below), whose sum is σ = 357987664. Its totient is φ = 169572960.

The previous prime is 261425069. The next prime is 261425117. The reversal of 261425091 is 190524162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261425091 - 2¹³ = 261416899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261425011) 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, 1177480 + ... + 1177701.

It is an arithmetic number, because the mean of its divisors is an integer number (44748458).

Almost surely, 2^261425091 is an apocalyptic number.

261425091 is a deficient number, since it is larger than the sum of its proper divisors (96562573).

261425091 is a wasteful number, since it uses less digits than its factorization.

261425091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355221.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 261425091 is about 16168.6453050341. The cubic root of 261425091 is about 639.4144147244.

The spelling of 261425091 in words is "two hundred sixty-one million, four hundred twenty-five thousand, ninety-one".