261334403 has 4 divisors (see below), whose sum is σ = 285092088. Its totient is φ = 237576720.

The previous prime is 261334397. The next prime is 261334439. The reversal of 261334403 is 304433162.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261334403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261334603) 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, 11878826 + ... + 11878847.

It is an arithmetic number, because the mean of its divisors is an integer number (71273022).

Almost surely, 2^261334403 is an apocalyptic number.

261334403 is a deficient number, since it is larger than the sum of its proper divisors (23757685).

261334403 is a wasteful number, since it uses less digits than its factorization.

261334403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23757684.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 261334403 is about 16165.8406215081. The cubic root of 261334403 is about 639.3404688499.

Adding to 261334403 its reverse (304433162), we get a palindrome (565767565).

The spelling of 261334403 in words is "two hundred sixty-one million, three hundred thirty-four thousand, four hundred three".