261425603 has 4 divisors (see below), whose sum is σ = 261521160. Its totient is φ = 261330048.

The previous prime is 261425597. The next prime is 261425623. The reversal of 261425603 is 306524162.

261425603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 261425603 - 2⁴ = 261425587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261425623) 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, 43550 + ... + 49187.

It is an arithmetic number, because the mean of its divisors is an integer number (65380290).

Almost surely, 2^261425603 is an apocalyptic number.

261425603 is a deficient number, since it is larger than the sum of its proper divisors (95557).

261425603 is an equidigital number, since it uses as much as digits as its factorization.

261425603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95556.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 261425603 is about 16168.6611381400. The cubic root of 261425603 is about 639.4148321544.

Adding to 261425603 its reverse (306524162), we get a palindrome (567949765).

The spelling of 261425603 in words is "two hundred sixty-one million, four hundred twenty-five thousand, six hundred three".