1261011 has 8 divisors (see below), whose sum is σ = 1769920. Its totient is φ = 796392.

The previous prime is 1260991. The next prime is 1261033. The reversal of 1261011 is 1101621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1261011 - 2⁵ = 1260979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261081) 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 7 ways as a sum of consecutive naturals, for example, 11005 + ... + 11118.

It is an arithmetic number, because the mean of its divisors is an integer number (221240).

2^1261011 is an apocalyptic number.

1261011 is a deficient number, since it is larger than the sum of its proper divisors (508909).

1261011 is a wasteful number, since it uses less digits than its factorization.

1261011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22145.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1261011 is about 1122.9474609259. The cubic root of 1261011 is about 108.0371100180.

Adding to 1261011 its reverse (1101621), we get a palindrome (2362632).

It can be divided in two parts, 12610 and 11, that added together give a palindrome (12621).

The spelling of 1261011 in words is "one million, two hundred sixty-one thousand, eleven".