261202123 has 8 divisors (see below), whose sum is σ = 321479648. Its totient is φ = 206665344.

The previous prime is 261202091. The next prime is 261202133. The reversal of 261202123 is 321202162.

261202123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 261202123 - 2⁵ = 261202091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261202123.

It is not an unprimeable number, because it can be changed into a prime (261202133) 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, 1435086 + ... + 1435267.

It is an arithmetic number, because the mean of its divisors is an integer number (40184956).

Almost surely, 2^261202123 is an apocalyptic number.

261202123 is a deficient number, since it is larger than the sum of its proper divisors (60277525).

261202123 is a wasteful number, since it uses less digits than its factorization.

261202123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870373.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 261202123 is about 16161.7487605766. The cubic root of 261202123 is about 639.2325786913.

Adding to 261202123 its reverse (321202162), we get a palindrome (582404285).

The spelling of 261202123 in words is "two hundred sixty-one million, two hundred two thousand, one hundred twenty-three".