261281214 has 40 divisors (see below), whose sum is σ = 588103560. Its totient is φ = 86701104.

The previous prime is 261281197. The next prime is 261281249. The reversal of 261281214 is 412182162.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33577 + ... + 40619.

It is an arithmetic number, because the mean of its divisors is an integer number (14702589).

Almost surely, 2^261281214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261281214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294051780).

261281214 is an abundant number, since it is smaller than the sum of its proper divisors (326822346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261281214 is a wasteful number, since it uses less digits than its factorization.

261281214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286 (or 7277 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 261281214 is about 16164.1954331170. The cubic root of 261281214 is about 639.2970912372.

The spelling of 261281214 in words is "two hundred sixty-one million, two hundred eighty-one thousand, two hundred fourteen".