261554122 has 8 divisors (see below), whose sum is σ = 401455296. Its totient is φ = 127735692.

The previous prime is 261554101. The next prime is 261554141. The reversal of 261554122 is 221455162.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520578 + ... + 1520749.

It is an arithmetic number, because the mean of its divisors is an integer number (50181912).

Almost surely, 2^261554122 is an apocalyptic number.

261554122 is a deficient number, since it is larger than the sum of its proper divisors (139901174).

261554122 is a wasteful number, since it uses less digits than its factorization.

261554122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041372.

The product of its digits is 4800, while the sum is 28.

The square root of 261554122 is about 16172.6349739305. The cubic root of 261554122 is about 639.5195955380.

The spelling of 261554122 in words is "two hundred sixty-one million, five hundred fifty-four thousand, one hundred twenty-two".