261614051 has 4 divisors (see below), whose sum is σ = 263370000. Its totient is φ = 259858104.

The previous prime is 261614039. The next prime is 261614137. The reversal of 261614051 is 150416162.

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 261614051 - 2¹⁸ = 261351907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261614051.

It is not an unprimeable number, because it can be changed into a prime (261614651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 877751 + ... + 878048.

It is an arithmetic number, because the mean of its divisors is an integer number (65842500).

Almost surely, 2^261614051 is an apocalyptic number.

261614051 is a deficient number, since it is larger than the sum of its proper divisors (1755949).

261614051 is a wasteful number, since it uses less digits than its factorization.

261614051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755948.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 261614051 is about 16174.4876580373. The cubic root of 261614051 is about 639.5684354527.

The spelling of 261614051 in words is "two hundred sixty-one million, six hundred fourteen thousand, fifty-one".