1263901 has 4 divisors (see below), whose sum is σ = 1304704. Its totient is φ = 1223100.

The previous prime is 1263887. The next prime is 1263917. The reversal of 1263901 is 1093621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1093621 = 19 ⋅57559.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263901 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 (1263931) 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, 20355 + ... + 20416.

It is an arithmetic number, because the mean of its divisors is an integer number (326176).

2^1263901 is an apocalyptic number.

It is an amenable number.

1263901 is a deficient number, since it is larger than the sum of its proper divisors (40803).

1263901 is an equidigital number, since it uses as much as digits as its factorization.

1263901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40802.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1263901 is about 1124.2335166681. The cubic root of 1263901 is about 108.1195806254.

The spelling of 1263901 in words is "one million, two hundred sixty-three thousand, nine hundred one".