5145991 has 2 divisors, whose sum is σ = 5145992. Its totient is φ = 5145990.

The previous prime is 5145977. The next prime is 5146003. The reversal of 5145991 is 1995415.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5145991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5145901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2572995 + 2572996.

It is an arithmetic number, because the mean of its divisors is an integer number (2572996).

Almost surely, 2^5145991 is an apocalyptic number.

5145991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5145991 is an equidigital number, since it uses as much as digits as its factorization.

5145991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 34.

The square root of 5145991 is about 2268.4776833815. The cubic root of 5145991 is about 172.6459284651.

The spelling of 5145991 in words is "five million, one hundred forty-five thousand, nine hundred ninety-one".