7212402 has 30 divisors (see below), whose sum is σ = 16238079. Its totient is φ = 2392740.

The previous prime is 7212397. The next prime is 7212487. The reversal of 7212402 is 2042127.

7212402 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3606201 + 3606201 = 1899^2 + 1899^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1899.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 34077 + ... + 34287.

Almost surely, 2^7212402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7212402

7212402 is an abundant number, since it is smaller than the sum of its proper divisors (9025677).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7212402 is an equidigital number, since it uses as much as digits as its factorization.

7212402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 7212402 is about 2685.5915549465. The cubic root of 7212402 is about 193.2086836882.

Multiplying 7212402 by its sum of digits (18), we get a square (129823236 = 11394²).

7212402 divided by its sum of digits (18) gives a square (400689 = 633²).

Adding to 7212402 its reverse (2042127), we get a palindrome (9254529).

The spelling of 7212402 in words is "seven million, two hundred twelve thousand, four hundred two".