1290623 has 12 divisors (see below), whose sum is σ = 1429920. Its totient is φ = 1160640.

The previous prime is 1290607. The next prime is 1290629. The reversal of 1290623 is 3260921.

It is not a de Polignac number, because 1290623 - 2⁴ = 1290607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16298 + ... + 16376.

It is an arithmetic number, because the mean of its divisors is an integer number (119160).

2^1290623 is an apocalyptic number.

1290623 is a deficient number, since it is larger than the sum of its proper divisors (139297).

1290623 is an equidigital number, since it uses as much as digits as its factorization.

1290623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1290623 is about 1136.0558965121. The cubic root of 1290623 is about 108.8762448104.

The spelling of 1290623 in words is "one million, two hundred ninety thousand, six hundred twenty-three".