1261673 has 4 divisors (see below), whose sum is σ = 1441920. Its totient is φ = 1081428.

The previous prime is 1261649. The next prime is 1261697. The reversal of 1261673 is 3761621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3761621 = 239 ⋅15739.

It is an interprime number because it is at equal distance from previous prime (1261649) and next prime (1261697).

It is a cyclic number.

It is not a de Polignac number, because 1261673 - 2¹⁸ = 999529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1261643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90113 + ... + 90126.

It is an arithmetic number, because the mean of its divisors is an integer number (360480).

2^1261673 is an apocalyptic number.

It is an amenable number.

1261673 is a deficient number, since it is larger than the sum of its proper divisors (180247).

1261673 is an equidigital number, since it uses as much as digits as its factorization.

1261673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180246.

The product of its digits is 1512, while the sum is 26.

The square root of 1261673 is about 1123.2421822563. The cubic root of 1261673 is about 108.0560123260.

The spelling of 1261673 in words is "one million, two hundred sixty-one thousand, six hundred seventy-three".