4072091 has 2 divisors, whose sum is σ = 4072092. Its totient is φ = 4072090.

The previous prime is 4072073. The next prime is 4072097. The reversal of 4072091 is 1902704.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4072091 - 2¹⁸ = 3809947 is a prime.

It is a super-2 number, since 2×4072091² = 33163850224562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4072097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2036045 + 2036046.

It is an arithmetic number, because the mean of its divisors is an integer number (2036046).

Almost surely, 2^4072091 is an apocalyptic number.

4072091 is a deficient number, since it is larger than the sum of its proper divisors (1).

4072091 is an equidigital number, since it uses as much as digits as its factorization.

4072091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 4072091 is about 2017.9422687480. The cubic root of 4072091 is about 159.6880771920.

Adding to 4072091 its reverse (1902704), we get a palindrome (5974795).

The spelling of 4072091 in words is "four million, seventy-two thousand, ninety-one".