261121262 has 8 divisors (see below), whose sum is σ = 393870600. Its totient is φ = 129831064.

The previous prime is 261121253. The next prime is 261121291. The reversal of 261121262 is 262121162.

It is a happy number.

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

It is a congruent number.

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, 364337 + ... + 365052.

It is an arithmetic number, because the mean of its divisors is an integer number (49233825).

Almost surely, 2^261121262 is an apocalyptic number.

261121262 is a deficient number, since it is larger than the sum of its proper divisors (132749338).

261121262 is a wasteful number, since it uses less digits than its factorization.

261121262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729570.

The product of its digits is 576, while the sum is 23.

The square root of 261121262 is about 16159.2469502759. The cubic root of 261121262 is about 639.1666089362.

The spelling of 261121262 in words is "two hundred sixty-one million, one hundred twenty-one thousand, two hundred sixty-two".