1123631 has 2 divisors, whose sum is σ = 1123632. Its totient is φ = 1123630.

The previous prime is 1123621. The next prime is 1123637. The reversal of 1123631 is 1363211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123631 - 2⁶ = 1123567 is a prime.

It is a super-2 number, since 2×1123631² = 2525093248322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561815 + 561816.

It is an arithmetic number, because the mean of its divisors is an integer number (561816).

2^1123631 is an apocalyptic number.

1123631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123631 is an equidigital number, since it uses as much as digits as its factorization.

1123631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 17.

The square root of 1123631 is about 1060.0146225407. The cubic root of 1123631 is about 103.9619868471.

Adding to 1123631 its reverse (1363211), we get a palindrome (2486842).

The spelling of 1123631 in words is "one million, one hundred twenty-three thousand, six hundred thirty-one".