261002067 has 4 divisors (see below), whose sum is σ = 348002760. Its totient is φ = 174001376.

The previous prime is 261002057. The next prime is 261002087. The reversal of 261002067 is 760200162.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261002067 - 2¹⁶ = 260936531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261002047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43500342 + ... + 43500347.

It is an arithmetic number, because the mean of its divisors is an integer number (87000690).

Almost surely, 2^261002067 is an apocalyptic number.

261002067 is a deficient number, since it is larger than the sum of its proper divisors (87000693).

261002067 is an equidigital number, since it uses as much as digits as its factorization.

261002067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87000692.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 261002067 is about 16155.5583933209. The cubic root of 261002067 is about 639.0693398761.

The spelling of 261002067 in words is "two hundred sixty-one million, two thousand, sixty-seven".