7142836 has 6 divisors (see below), whose sum is σ = 12499970. Its totient is φ = 3571416.

The previous prime is 7142833. The next prime is 7142851. The reversal of 7142836 is 6382417.

7142836 = 534² + 535² + ... + 557².

It can be written as a sum of positive squares in only one way, i.e., 6990736 + 152100 = 2644^2 + 390^2 .

It is a super-2 number, since 2×7142836² = 102040212245792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7142798 and 7142807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7142833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 892851 + ... + 892858.

Almost surely, 2^7142836 is an apocalyptic number.

It is an amenable number.

7142836 is a deficient number, since it is larger than the sum of its proper divisors (5357134).

7142836 is a wasteful number, since it uses less digits than its factorization.

7142836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785713 (or 1785711 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 7142836 is about 2672.6084636549. The cubic root of 7142836 is about 192.5854885374.

The spelling of 7142836 in words is "seven million, one hundred forty-two thousand, eight hundred thirty-six".