2237661 has 12 divisors (see below), whose sum is σ = 3263260. Its totient is φ = 1477440.

The previous prime is 2237629. The next prime is 2237671. The reversal of 2237661 is 1667322.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1454436 + 783225 = 1206^2 + 885^2 .

It is not a de Polignac number, because 2237661 - 2⁵ = 2237629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2237671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160 + ... + 2121.

2^2237661 is an apocalyptic number.

It is an amenable number.

2237661 is a deficient number, since it is larger than the sum of its proper divisors (1025599).

2237661 is a wasteful number, since it uses less digits than its factorization.

2237661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396 (or 2393 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 2237661 is about 1495.8813455619. The cubic root of 2237661 is about 130.7970947367.

The spelling of 2237661 in words is "two million, two hundred thirty-seven thousand, six hundred sixty-one".