2142917 has 12 divisors (see below), whose sum is σ = 2523276. Its totient is φ = 1814400.

The previous prime is 2142911. The next prime is 2142923. The reversal of 2142917 is 7192412.

It is an interprime number because it is at equal distance from previous prime (2142911) and next prime (2142923).

It can be written as a sum of positive squares in 2 ways, for example, as 1223236 + 919681 = 1106^2 + 959^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2142917 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4733 + ... + 5165.

It is an arithmetic number, because the mean of its divisors is an integer number (210273).

2^2142917 is an apocalyptic number.

It is an amenable number.

2142917 is a deficient number, since it is larger than the sum of its proper divisors (380359).

2142917 is a wasteful number, since it uses less digits than its factorization.

2142917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 541 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 2142917 is about 1463.8705543866. The cubic root of 2142917 is about 128.9243993460.

The spelling of 2142917 in words is "two million, one hundred forty-two thousand, nine hundred seventeen".