261140047 has 8 divisors (see below), whose sum is σ = 314153600. Its totient is φ = 212053464.

The previous prime is 261140039. The next prime is 261140051. The reversal of 261140047 is 740041162.

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

It is not a de Polignac number, because 261140047 - 2³ = 261140039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261140017) 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, 981597 + ... + 981862.

It is an arithmetic number, because the mean of its divisors is an integer number (39269200).

Almost surely, 2^261140047 is an apocalyptic number.

261140047 is a deficient number, since it is larger than the sum of its proper divisors (53013553).

261140047 is a wasteful number, since it uses less digits than its factorization.

261140047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963485.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 261140047 is about 16159.8281859678. The cubic root of 261140047 is about 639.1819357320.

The spelling of 261140047 in words is "two hundred sixty-one million, one hundred forty thousand, forty-seven".