1226661 has 16 divisors (see below), whose sum is σ = 1725504. Its totient is φ = 774144.

The previous prime is 1226651. The next prime is 1226663. The reversal of 1226661 is 1666221.

It is not a de Polignac number, because 1226661 - 2⁵ = 1226629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226663) 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, 4645 + ... + 4901.

It is an arithmetic number, because the mean of its divisors is an integer number (107844).

2^1226661 is an apocalyptic number.

It is an amenable number.

1226661 is a deficient number, since it is larger than the sum of its proper divisors (498843).

1226661 is a wasteful number, since it uses less digits than its factorization.

1226661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340.

The product of its digits is 864, while the sum is 24.

The square root of 1226661 is about 1107.5472901867. The cubic root of 1226661 is about 107.0470867379.

The spelling of 1226661 in words is "one million, two hundred twenty-six thousand, six hundred sixty-one".