3821157 has 6 divisors (see below), whose sum is σ = 5519462. Its totient is φ = 2547432.

The previous prime is 3821137. The next prime is 3821171. The reversal of 3821157 is 7511283.

It can be written as a sum of positive squares in only one way, i.e., 3048516 + 772641 = 1746^2 + 879^2 .

It is not a de Polignac number, because 3821157 - 2¹⁰ = 3820133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3821157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212278 + ... + 212295.

Almost surely, 2^3821157 is an apocalyptic number.

It is an amenable number.

3821157 is a deficient number, since it is larger than the sum of its proper divisors (1698305).

3821157 is a wasteful number, since it uses less digits than its factorization.

3821157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424579 (or 424576 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 3821157 is about 1954.7779925096. Note that the first 3 decimals coincide. The cubic root of 3821157 is about 156.3381471698.

The spelling of 3821157 in words is "three million, eight hundred twenty-one thousand, one hundred fifty-seven".