4001213 has 2 divisors, whose sum is σ = 4001214. Its totient is φ = 4001212.

The previous prime is 4001197. The next prime is 4001219. The reversal of 4001213 is 3121004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3485689 + 515524 = 1867^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 4001213 - 2⁴ = 4001197 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4001194 and 4001203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4001219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000606 + 2000607.

It is an arithmetic number, because the mean of its divisors is an integer number (2000607).

Almost surely, 2^4001213 is an apocalyptic number.

It is an amenable number.

4001213 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001213 is an equidigital number, since it uses as much as digits as its factorization.

4001213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 4001213 is about 2000.3032270133. The cubic root of 4001213 is about 158.7561495541.

Adding to 4001213 its reverse (3121004), we get a palindrome (7122217).

The spelling of 4001213 in words is "four million, one thousand, two hundred thirteen".