2991451 has 2 divisors, whose sum is σ = 2991452. Its totient is φ = 2991450.

The previous prime is 2991433. The next prime is 2991463. The reversal of 2991451 is 1541992.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2991451 is a prime.

It is a Chen prime.

2991451 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2991421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495725 + 1495726.

It is an arithmetic number, because the mean of its divisors is an integer number (1495726).

2^2991451 is an apocalyptic number.

2991451 is the 925-th centered heptagonal number.

2991451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2991451 is an equidigital number, since it uses as much as digits as its factorization.

2991451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 31.

The square root of 2991451 is about 1729.5811631722. The cubic root of 2991451 is about 144.0878290076.

The spelling of 2991451 in words is "two million, nine hundred ninety-one thousand, four hundred fifty-one".