2142836 has 6 divisors (see below), whose sum is σ = 3749970. Its totient is φ = 1071416.

The previous prime is 2142823. The next prime is 2142857. The reversal of 2142836 is 6382412.

It can be written as a sum of positive squares in only one way, i.e., 2131600 + 11236 = 1460^2 + 106^2 .

It is a super-2 number, since 2×2142836² = 9183492245792, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁸ + 1 + 4⁷ + 2¹⁸ + 8² + 3¹³ + 6⁵ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267851 + ... + 267858.

It is an arithmetic number, because the mean of its divisors is an integer number (624995).

2^2142836 is an apocalyptic number.

It is an amenable number.

2142836 is a deficient number, since it is larger than the sum of its proper divisors (1607134).

2142836 is a wasteful number, since it uses less digits than its factorization.

2142836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535713 (or 535711 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 2142836 is about 1463.8428877444. The cubic root of 2142836 is about 128.9227749235.

The spelling of 2142836 in words is "two million, one hundred forty-two thousand, eight hundred thirty-six".