1261247 has 12 divisors (see below), whose sum is σ = 1449360. Its totient is φ = 1093248.

The previous prime is 1261223. The next prime is 1261259. The reversal of 1261247 is 7421621.

It is not a de Polignac number, because 1261247 - 2⁸ = 1260991 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 (1261217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2654 + ... + 3092.

It is an arithmetic number, because the mean of its divisors is an integer number (120780).

2^1261247 is an apocalyptic number.

1261247 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1261247 is a deficient number, since it is larger than the sum of its proper divisors (188113).

1261247 is a wasteful number, since it uses less digits than its factorization.

1261247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 469 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 1261247 is about 1123.0525366162. The cubic root of 1261247 is about 108.0438493638.

Adding to 1261247 its reverse (7421621), we get a palindrome (8682868).

The spelling of 1261247 in words is "one million, two hundred sixty-one thousand, two hundred forty-seven".