1247429 has 2 divisors, whose sum is σ = 1247430. Its totient is φ = 1247428.

The previous prime is 1247419. The next prime is 1247447. The reversal of 1247429 is 9247421.

1247429 is nontrivially palindromic in base 9.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1151329 + 96100 = 1073^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1247429 - 2¹⁶ = 1181893 is a prime.

It is a super-2 number, since 2×1247429² = 3112158220082, which contains 22 as substring.

It is a Chen prime.

It is equal to p₉₆₂₇₅ and since 1247429 and 96275 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623714 + 623715.

It is an arithmetic number, because the mean of its divisors is an integer number (623715).

2^1247429 is an apocalyptic number.

It is an amenable number.

1247429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247429 is an equidigital number, since it uses as much as digits as its factorization.

1247429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 1247429 is about 1116.8836107670. The cubic root of 1247429 is about 107.6478297882.

The spelling of 1247429 in words is "one million, two hundred forty-seven thousand, four hundred twenty-nine".