3781157 has 8 divisors (see below), whose sum is σ = 4046616. Its totient is φ = 3520512.

The previous prime is 3781153. The next prime is 3781187. The reversal of 3781157 is 7511873.

3781157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 591361 + 3189796 = 769^2 + 1786^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3781157 - 2² = 3781153 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503 + ... + 2795.

It is an arithmetic number, because the mean of its divisors is an integer number (505827).

Almost surely, 2^3781157 is an apocalyptic number.

It is an amenable number.

3781157 is a deficient number, since it is larger than the sum of its proper divisors (265459).

3781157 is a wasteful number, since it uses less digits than its factorization.

3781157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407.

The product of its digits is 5880, while the sum is 32.

The square root of 3781157 is about 1944.5197350503. The cubic root of 3781157 is about 155.7907148619.

The spelling of 3781157 in words is "three million, seven hundred eighty-one thousand, one hundred fifty-seven".