3661131 has 8 divisors (see below), whose sum is σ = 5039104. Its totient is φ = 2361960.

The previous prime is 3661123. The next prime is 3661139. The reversal of 3661131 is 1311663.

It is an interprime number because it is at equal distance from previous prime (3661123) and next prime (3661139).

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

It is not a de Polignac number, because 3661131 - 2³ = 3661123 is a prime.

It is a super-2 number, since 2×3661131² = 26807760398322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3661098 and 3661107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19591 + ... + 19776.

It is an arithmetic number, because the mean of its divisors is an integer number (629888).

Almost surely, 2^3661131 is an apocalyptic number.

3661131 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3661131 is a deficient number, since it is larger than the sum of its proper divisors (1377973).

3661131 is a wasteful number, since it uses less digits than its factorization.

3661131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39401.

The product of its digits is 324, while the sum is 21.

The square root of 3661131 is about 1913.4082157240. The cubic root of 3661131 is about 154.1245268155.

Adding to 3661131 its reverse (1311663), we get a palindrome (4972794).

The spelling of 3661131 in words is "three million, six hundred sixty-one thousand, one hundred thirty-one".