1109951 has 2 divisors, whose sum is σ = 1109952. Its totient is φ = 1109950.

The previous prime is 1109921. The next prime is 1109987. The reversal of 1109951 is 1599011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1109951 - 2⁶ = 1109887 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1109951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1109921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554975 + 554976.

It is an arithmetic number, because the mean of its divisors is an integer number (554976).

2^1109951 is an apocalyptic number.

1109951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109951 is an equidigital number, since it uses as much as digits as its factorization.

1109951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405, while the sum is 26.

The square root of 1109951 is about 1053.5421206577. The cubic root of 1109951 is about 103.5383569626.

The spelling of 1109951 in words is "one million, one hundred nine thousand, nine hundred fifty-one".