261874454 has 12 divisors (see below), whose sum is σ = 414575244. Its totient is φ = 124045452.

The previous prime is 261874439. The next prime is 261874469. The reversal of 261874454 is 454478162.

It is an interprime number because it is at equal distance from previous prime (261874439) and next prime (261874469).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180632 + ... + 182075.

It is an arithmetic number, because the mean of its divisors is an integer number (34547937).

Almost surely, 2^261874454 is an apocalyptic number.

261874454 is a deficient number, since it is larger than the sum of its proper divisors (152700790).

261874454 is a wasteful number, since it uses less digits than its factorization.

261874454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362747 (or 362728 counting only the distinct ones).

The product of its digits is 215040, while the sum is 41.

The square root of 261874454 is about 16182.5354626523. The cubic root of 261874454 is about 639.7805676770.

The spelling of 261874454 in words is "two hundred sixty-one million, eight hundred seventy-four thousand, four hundred fifty-four".