1121629 has 2 divisors, whose sum is σ = 1121630. Its totient is φ = 1121628.

The previous prime is 1121621. The next prime is 1121651. The reversal of 1121629 is 9261211.

It is an a-pointer prime, because the next prime (1121651) can be obtained adding 1121629 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 813604 + 308025 = 902^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121629 - 2³ = 1121621 is a prime.

It is a super-2 number, since 2×1121629² = 2516103227282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560814 + 560815.

It is an arithmetic number, because the mean of its divisors is an integer number (560815).

2^1121629 is an apocalyptic number.

It is an amenable number.

1121629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121629 is an equidigital number, since it uses as much as digits as its factorization.

1121629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 1121629 is about 1059.0698749374. The cubic root of 1121629 is about 103.9002062948.

The spelling of 1121629 in words is "one million, one hundred twenty-one thousand, six hundred twenty-nine".