1264147 has 4 divisors (see below), whose sum is σ = 1266640. Its totient is φ = 1261656.

The previous prime is 1264129. The next prime is 1264177. The reversal of 1264147 is 7414621.

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 1264147 - 2¹¹ = 1262099 is a prime.

It is a Duffinian number.

1264147 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1264177) 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, 183 + ... + 1600.

It is an arithmetic number, because the mean of its divisors is an integer number (316660).

2^1264147 is an apocalyptic number.

1264147 is a deficient number, since it is larger than the sum of its proper divisors (2493).

1264147 is an equidigital number, since it uses as much as digits as its factorization.

1264147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492.

The product of its digits is 1344, while the sum is 25.

The square root of 1264147 is about 1124.3429192199. The cubic root of 1264147 is about 108.1265948065.

Adding to 1264147 its reverse (7414621), we get a palindrome (8678768).

The spelling of 1264147 in words is "one million, two hundred sixty-four thousand, one hundred forty-seven".