263421345 has 16 divisors (see below), whose sum is σ = 459790272. Its totient is φ = 127719360.

The previous prime is 263421343. The next prime is 263421349. The reversal of 263421345 is 543124362.

It is not a de Polignac number, because 263421345 - 2¹ = 263421343 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (263421343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 798082 + ... + 798411.

It is an arithmetic number, because the mean of its divisors is an integer number (28736892).

Almost surely, 2^263421345 is an apocalyptic number.

It is an amenable number.

263421345 is a deficient number, since it is larger than the sum of its proper divisors (196368927).

263421345 is a wasteful number, since it uses less digits than its factorization.

263421345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596512.

The product of its digits is 17280, while the sum is 30.

The square root of 263421345 is about 16230.2601642734. The cubic root of 263421345 is about 641.0378221830.

The spelling of 263421345 in words is "two hundred sixty-three million, four hundred twenty-one thousand, three hundred forty-five".