1000261 has 4 divisors (see below), whose sum is σ = 1004224. Its totient is φ = 996300.

The previous prime is 1000253. The next prime is 1000273. The reversal of 1000261 is 1620001.

1000261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 1000261 - 2³ = 1000253 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000211) 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, 1575 + ... + 2116.

It is an arithmetic number, because the mean of its divisors is an integer number (251056).

2^1000261 is an apocalyptic number.

It is an amenable number.

1000261 is a deficient number, since it is larger than the sum of its proper divisors (3963).

1000261 is an equidigital number, since it uses as much as digits as its factorization.

1000261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1000261 is about 1000.1304914860. The cubic root of 1000261 is about 100.0086992432.

Adding to 1000261 its reverse (1620001), we get a palindrome (2620262).

The spelling of 1000261 in words is "one million, two hundred sixty-one", and thus it is an aban number.