1247427 has 16 divisors (see below), whose sum is σ = 1889280. Its totient is φ = 813096.

The previous prime is 1247419. The next prime is 1247429. The reversal of 1247427 is 7247421.

It is a happy number.

It is not a de Polignac number, because 1247427 - 2³ = 1247419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1247427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 778 + ... + 1760.

It is an arithmetic number, because the mean of its divisors is an integer number (118080).

2^1247427 is an apocalyptic number.

1247427 is a deficient number, since it is larger than the sum of its proper divisors (641853).

1247427 is an equidigital number, since it uses as much as digits as its factorization.

1247427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1033 counting only the distinct ones).

The product of its digits is 3136, while the sum is 27.

The square root of 1247427 is about 1116.8827154182. The cubic root of 1247427 is about 107.6477722576.

The spelling of 1247427 in words is "one million, two hundred forty-seven thousand, four hundred twenty-seven".