261371458 has 16 divisors (see below), whose sum is σ = 407759616. Its totient is φ = 125551440.

The previous prime is 261371449. The next prime is 261371459. The reversal of 261371458 is 854173162.

It is not an unprimeable number, because it can be changed into a prime (261371459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19666 + ... + 30157.

It is an arithmetic number, because the mean of its divisors is an integer number (25484976).

Almost surely, 2^261371458 is an apocalyptic number.

261371458 is a deficient number, since it is larger than the sum of its proper divisors (146388158).

261371458 is a wasteful number, since it uses less digits than its factorization.

261371458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49929.

The product of its digits is 40320, while the sum is 37.

The square root of 261371458 is about 16166.9866703724. The cubic root of 261371458 is about 639.3706851056.

The spelling of 261371458 in words is "two hundred sixty-one million, three hundred seventy-one thousand, four hundred fifty-eight".