3781156 has 6 divisors (see below), whose sum is σ = 6617030. Its totient is φ = 1890576.

The previous prime is 3781153. The next prime is 3781187. The reversal of 3781156 is 6511873.

It can be written as a sum of positive squares in only one way, i.e., 3006756 + 774400 = 1734^2 + 880^2 .

It is not an unprimeable number, because it can be changed into a prime (3781153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472641 + ... + 472648.

Almost surely, 2^3781156 is an apocalyptic number.

It is an amenable number.

3781156 is a deficient number, since it is larger than the sum of its proper divisors (2835874).

3781156 is a wasteful number, since it uses less digits than its factorization.

3781156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945293 (or 945291 counting only the distinct ones).

The product of its digits is 5040, while the sum is 31.

The square root of 3781156 is about 1944.5194779174. The cubic root of 3781156 is about 155.7907011280.

The spelling of 3781156 in words is "three million, seven hundred eighty-one thousand, one hundred fifty-six".