265620403 has 4 divisors (see below), whose sum is σ = 265816080. Its totient is φ = 265424728.

The previous prime is 265620371. The next prime is 265620409. The reversal of 265620403 is 304026562.

It is a happy number.

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 265620403 - 2⁵ = 265620371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265620409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95788 + ... + 98521.

It is an arithmetic number, because the mean of its divisors is an integer number (66454020).

Almost surely, 2^265620403 is an apocalyptic number.

265620403 is a deficient number, since it is larger than the sum of its proper divisors (195677).

265620403 is a wasteful number, since it uses less digits than its factorization.

265620403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195676.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 265620403 is about 16297.8649828743. The cubic root of 265620403 is about 642.8166893509.

Adding to 265620403 its reverse (304026562), we get a palindrome (569646965).

The spelling of 265620403 in words is "two hundred sixty-five million, six hundred twenty thousand, four hundred three".