1261369 has 4 divisors (see below), whose sum is σ = 1264000. Its totient is φ = 1258740.

The previous prime is 1261363. The next prime is 1261373. The reversal of 1261369 is 9631621.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1261369 is a prime.

It is a super-2 number, since 2×1261369² = 3182103508322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261363) 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 3 ways as a sum of consecutive naturals, for example, 369 + ... + 1630.

It is an arithmetic number, because the mean of its divisors is an integer number (316000).

2^1261369 is an apocalyptic number.

It is an amenable number.

1261369 is a deficient number, since it is larger than the sum of its proper divisors (2631).

1261369 is an equidigital number, since it uses as much as digits as its factorization.

1261369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630.

The product of its digits is 1944, while the sum is 28.

The square root of 1261369 is about 1123.1068515506. The cubic root of 1261369 is about 108.0473329333.

The spelling of 1261369 in words is "one million, two hundred sixty-one thousand, three hundred sixty-nine".