261425123 has 8 divisors (see below), whose sum is σ = 275343120. Its totient is φ = 247523040.

The previous prime is 261425117. The next prime is 261425147. The reversal of 261425123 is 321524162.

It is a happy number.

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 261425123 - 2¹⁰ = 261424099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261425092 and 261425101.

It is not an unprimeable number, because it can be changed into a prime (261425023) 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, 45893 + ... + 51273.

It is an arithmetic number, because the mean of its divisors is an integer number (34417890).

Almost surely, 2^261425123 is an apocalyptic number.

261425123 is a deficient number, since it is larger than the sum of its proper divisors (13917997).

261425123 is a wasteful number, since it uses less digits than its factorization.

261425123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7957.

The product of its digits is 2880, while the sum is 26.

The square root of 261425123 is about 16168.6462946036. The cubic root of 261425123 is about 639.4144408138.

Adding to 261425123 its reverse (321524162), we get a palindrome (582949285).

The spelling of 261425123 in words is "two hundred sixty-one million, four hundred twenty-five thousand, one hundred twenty-three".