1261445 has 4 divisors (see below), whose sum is σ = 1513740. Its totient is φ = 1009152.

The previous prime is 1261427. The next prime is 1261459. The reversal of 1261445 is 5441621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 306916 + 954529 = 554^2 + 977^2 .

It is a cyclic number.

It is not a de Polignac number, because 1261445 - 2²⁰ = 212869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1261445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126140 + ... + 126149.

It is an arithmetic number, because the mean of its divisors is an integer number (378435).

2^1261445 is an apocalyptic number.

It is an amenable number.

1261445 is a deficient number, since it is larger than the sum of its proper divisors (252295).

1261445 is an equidigital number, since it uses as much as digits as its factorization.

1261445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252294.

The product of its digits is 960, while the sum is 23.

The square root of 1261445 is about 1123.1406857558. The cubic root of 1261445 is about 108.0495029122.

The spelling of 1261445 in words is "one million, two hundred sixty-one thousand, four hundred forty-five".