1290123 has 12 divisors (see below), whose sum is σ = 1928160. Its totient is φ = 830256.

The previous prime is 1290109. The next prime is 1290131. The reversal of 1290123 is 3210921.

It is a happy number.

It is not a de Polignac number, because 1290123 - 2⁸ = 1289867 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1290096 and 1290105.

It is not an unprimeable number, because it can be changed into a prime (1290143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2211 + ... + 2732.

It is an arithmetic number, because the mean of its divisors is an integer number (160680).

2^1290123 is an apocalyptic number.

1290123 is a deficient number, since it is larger than the sum of its proper divisors (638037).

1290123 is a wasteful number, since it uses less digits than its factorization.

1290123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4978 (or 4975 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1290123 is about 1135.8358156001. The cubic root of 1290123 is about 108.8621830862.

The spelling of 1290123 in words is "one million, two hundred ninety thousand, one hundred twenty-three".