1247629 has 4 divisors (see below), whose sum is σ = 1249884. Its totient is φ = 1245376.

The previous prime is 1247627. The next prime is 1247641. The reversal of 1247629 is 9267421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1020100 + 227529 = 1010^2 + 477^2 .

It is a cyclic number.

It is not a de Polignac number, because 1247629 - 2¹ = 1247627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1247629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247621) 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, 339 + ... + 1615.

It is an arithmetic number, because the mean of its divisors is an integer number (312471).

2^1247629 is an apocalyptic number.

It is an amenable number.

1247629 is a deficient number, since it is larger than the sum of its proper divisors (2255).

1247629 is an equidigital number, since it uses as much as digits as its factorization.

1247629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254.

The product of its digits is 6048, while the sum is 31.

The square root of 1247629 is about 1116.9731420227. The cubic root of 1247629 is about 107.6535825312.

The spelling of 1247629 in words is "one million, two hundred forty-seven thousand, six hundred twenty-nine".