261842343 has 8 divisors (see below), whose sum is σ = 398997888. Its totient is φ = 149624184.

The previous prime is 261842323. The next prime is 261842369. The reversal of 261842343 is 343248162.

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

It is a de Polignac number, because none of the positive numbers 2^k-261842343 is a prime.

It is a super-2 number, since 2×261842343² = 137122825175459298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261842323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6234321 + ... + 6234362.

It is an arithmetic number, because the mean of its divisors is an integer number (49874736).

Almost surely, 2^261842343 is an apocalyptic number.

261842343 is a deficient number, since it is larger than the sum of its proper divisors (137155545).

261842343 is a wasteful number, since it uses less digits than its factorization.

261842343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12468693.

The product of its digits is 27648, while the sum is 33.

The square root of 261842343 is about 16181.5432823943. The cubic root of 261842343 is about 639.7544166808.

The spelling of 261842343 in words is "two hundred sixty-one million, eight hundred forty-two thousand, three hundred forty-three".