1261923 has 24 divisors (see below), whose sum is σ = 1932480. Its totient is φ = 730080.

The previous prime is 1261913. The next prime is 1261933. The reversal of 1261923 is 3291621.

It is an interprime number because it is at equal distance from previous prime (1261913) and next prime (1261933).

It is not a de Polignac number, because 1261923 - 2⁵ = 1261891 is a prime.

1261923 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1261893 and 1261902.

It is not an unprimeable number, because it can be changed into a prime (1261913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9568 + ... + 9698.

It is an arithmetic number, because the mean of its divisors is an integer number (80520).

2^1261923 is an apocalyptic number.

1261923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1261923 is a deficient number, since it is larger than the sum of its proper divisors (670557).

1261923 is a wasteful number, since it uses less digits than its factorization.

1261923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 166 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 1261923 is about 1123.3534617386. The cubic root of 1261923 is about 108.0631489399.

The spelling of 1261923 in words is "one million, two hundred sixty-one thousand, nine hundred twenty-three".