6401263 has 6 divisors (see below), whose sum is σ = 7036232. Its totient is φ = 5819220.

The previous prime is 6401249. The next prime is 6401267. The reversal of 6401263 is 3621046.

It is a de Polignac number, because none of the positive numbers 2^k-6401263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26331 + ... + 26572.

Almost surely, 2^6401263 is an apocalyptic number.

6401263 is a deficient number, since it is larger than the sum of its proper divisors (634969).

6401263 is a wasteful number, since it uses less digits than its factorization.

6401263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52925 (or 52914 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 6401263 is about 2530.0717381134. The cubic root of 6401263 is about 185.6757657218.

The spelling of 6401263 in words is "six million, four hundred one thousand, two hundred sixty-three".