261420603 has 8 divisors (see below), whose sum is σ = 348771600. Its totient is φ = 174175008.

The previous prime is 261420571. The next prime is 261420617. The reversal of 261420603 is 306024162.

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

It is not a de Polignac number, because 261420603 - 2⁵ = 261420571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261420683) 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, 20368 + ... + 30621.

It is an arithmetic number, because the mean of its divisors is an integer number (43596450).

Almost surely, 2^261420603 is an apocalyptic number.

261420603 is a deficient number, since it is larger than the sum of its proper divisors (87350997).

261420603 is a wasteful number, since it uses less digits than its factorization.

261420603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52701.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 261420603 is about 16168.5065173008. The cubic root of 261420603 is about 639.4107556669.

Adding to 261420603 its reverse (306024162), we get a palindrome (567444765).

The spelling of 261420603 in words is "two hundred sixty-one million, four hundred twenty thousand, six hundred three".