1209261 has 16 divisors (see below), whose sum is σ = 1729728. Its totient is φ = 748800.

The previous prime is 1209251. The next prime is 1209269. The reversal of 1209261 is 1629021.

It is not a de Polignac number, because 1209261 - 2¹⁰ = 1208237 is a prime.

It is a super-2 number, since 2×1209261² = 2924624332242, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6591 + ... + 6771.

It is an arithmetic number, because the mean of its divisors is an integer number (108108).

2^1209261 is an apocalyptic number.

It is an amenable number.

1209261 is a deficient number, since it is larger than the sum of its proper divisors (520467).

1209261 is a wasteful number, since it uses less digits than its factorization.

1209261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1209261 is about 1099.6640396048. The cubic root of 1209261 is about 106.5385255934.

The spelling of 1209261 in words is "one million, two hundred nine thousand, two hundred sixty-one".