1263629 has 2 divisors, whose sum is σ = 1263630. Its totient is φ = 1263628.

The previous prime is 1263607. The next prime is 1263631. The reversal of 1263629 is 9263621.

1263629 is nontrivially palindromic in base 9.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1261129 + 2500 = 1123^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263629 - 2⁸ = 1263373 is a prime.

Together with 1263631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631814 + 631815.

It is an arithmetic number, because the mean of its divisors is an integer number (631815).

2^1263629 is an apocalyptic number.

It is an amenable number.

1263629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263629 is an equidigital number, since it uses as much as digits as its factorization.

1263629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The square root of 1263629 is about 1124.1125388501. The cubic root of 1263629 is about 108.1118240485. Note that the first 3 decimals are identical.

The spelling of 1263629 in words is "one million, two hundred sixty-three thousand, six hundred twenty-nine".