1263913 has 8 divisors (see below), whose sum is σ = 1459328. Its totient is φ = 1072224.

The previous prime is 1263887. The next prime is 1263917. The reversal of 1263913 is 3193621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1263913 - 2¹³ = 1255721 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (1263917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156 + ... + 1597.

It is an arithmetic number, because the mean of its divisors is an integer number (182416).

2^1263913 is an apocalyptic number.

It is an amenable number.

1263913 is a deficient number, since it is larger than the sum of its proper divisors (195415).

1263913 is a wasteful number, since it uses less digits than its factorization.

1263913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863.

The product of its digits is 972, while the sum is 25.

The square root of 1263913 is about 1124.2388536250. The cubic root of 1263913 is about 108.1199228017.

The spelling of 1263913 in words is "one million, two hundred sixty-three thousand, nine hundred thirteen".