4200991 has 2 divisors, whose sum is σ = 4200992. Its totient is φ = 4200990.

The previous prime is 4200953. The next prime is 4201003. The reversal of 4200991 is 1990024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4200991 - 2⁷ = 4200863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4200941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2100495 + 2100496.

It is an arithmetic number, because the mean of its divisors is an integer number (2100496).

Almost surely, 2^4200991 is an apocalyptic number.

4200991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4200991 is an equidigital number, since it uses as much as digits as its factorization.

4200991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 4200991 is about 2049.6319181746. The cubic root of 4200991 is about 161.3555533489.

The spelling of 4200991 in words is "four million, two hundred thousand, nine hundred ninety-one".