261462601 has 4 divisors (see below), whose sum is σ = 276842772. Its totient is φ = 246082432.

The previous prime is 261462599. The next prime is 261462623. The reversal of 261462601 is 106264162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106264162 = 2 ⋅53132081.

It can be written as a sum of positive squares in 2 ways, for example, as 214183225 + 47279376 = 14635^2 + 6876^2 .

It is a cyclic number.

It is not a de Polignac number, because 261462601 - 2¹ = 261462599 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 261462601.

It is not an unprimeable number, because it can be changed into a prime (261462671) 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, 7690060 + ... + 7690093.

It is an arithmetic number, because the mean of its divisors is an integer number (69210693).

Almost surely, 2^261462601 is an apocalyptic number.

It is an amenable number.

261462601 is a deficient number, since it is larger than the sum of its proper divisors (15380171).

261462601 is a wasteful number, since it uses less digits than its factorization.

261462601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15380170.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 261462601 is about 16169.8052245536. The cubic root of 261462601 is about 639.4449949155. Note that the first 3 decimals are identical.

The spelling of 261462601 in words is "two hundred sixty-one million, four hundred sixty-two thousand, six hundred one".