2861217 has 8 divisors (see below), whose sum is σ = 4238880. Its totient is φ = 1907460.

The previous prime is 2861213. The next prime is 2861231. The reversal of 2861217 is 7121682.

It is not a de Polignac number, because 2861217 - 2² = 2861213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 105971 = 2861217 / (2 + 8 + 6 + 1 + 2 + 1 + 7).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2861213) 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, 52959 + ... + 53012.

It is an arithmetic number, because the mean of its divisors is an integer number (529860).

2^2861217 is an apocalyptic number.

2861217 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2861217 is a deficient number, since it is larger than the sum of its proper divisors (1377663).

2861217 is a wasteful number, since it uses less digits than its factorization.

2861217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105980 (or 105974 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2861217 is about 1691.5132278525. The cubic root of 2861217 is about 141.9657558104.

Adding to 2861217 its reverse (7121682), we get a palindrome (9982899).

The spelling of 2861217 in words is "two million, eight hundred sixty-one thousand, two hundred seventeen".