3781297 has 4 divisors (see below), whose sum is σ = 4072180. Its totient is φ = 3490416.

The previous prime is 3781277. The next prime is 3781301. The reversal of 3781297 is 7921873.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2283121 + 1498176 = 1511^2 + 1224^2 .

It is a cyclic number.

It is not a de Polignac number, because 3781297 - 2¹¹ = 3779249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3781237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145422 + ... + 145447.

It is an arithmetic number, because the mean of its divisors is an integer number (1018045).

Almost surely, 2^3781297 is an apocalyptic number.

It is an amenable number.

3781297 is a deficient number, since it is larger than the sum of its proper divisors (290883).

3781297 is a wasteful number, since it uses less digits than its factorization.

3781297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290882.

The product of its digits is 21168, while the sum is 37.

The square root of 3781297 is about 1944.5557333232. Note that the first 3 decimals coincide. The cubic root of 3781297 is about 155.7926375918.

The spelling of 3781297 in words is "three million, seven hundred eighty-one thousand, two hundred ninety-seven".