7212136 has 8 divisors (see below), whose sum is σ = 13522770. Its totient is φ = 3606064.

The previous prime is 7212083. The next prime is 7212157. The reversal of 7212136 is 6312127.

It can be written as a sum of positive squares in only one way, i.e., 6200100 + 1012036 = 2490^2 + 1006^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450751 + ... + 450766.

Almost surely, 2^7212136 is an apocalyptic number.

It is an amenable number.

7212136 is a deficient number, since it is larger than the sum of its proper divisors (6310634).

7212136 is a wasteful number, since it uses less digits than its factorization.

7212136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901523 (or 901519 counting only the distinct ones).

The product of its digits is 504, while the sum is 22.

The square root of 7212136 is about 2685.5420309502. The cubic root of 7212136 is about 193.2063084212.

Subtracting from 7212136 its reverse (6312127), we obtain a palindrome (900009).

The spelling of 7212136 in words is "seven million, two hundred twelve thousand, one hundred thirty-six".