1298719 has 2 divisors, whose sum is σ = 1298720. Its totient is φ = 1298718.

The previous prime is 1298699. The next prime is 1298723. The reversal of 1298719 is 9178921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1298719 is a prime.

It is a super-2 number, since 2×1298719² = 3373342081922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298779) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649359 + 649360.

It is an arithmetic number, because the mean of its divisors is an integer number (649360).

2^1298719 is an apocalyptic number.

1298719 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298719 is an equidigital number, since it uses as much as digits as its factorization.

1298719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 37.

The square root of 1298719 is about 1139.6135309832. The cubic root of 1298719 is about 109.1034284664.

It can be divided in two parts, 12987 and 19, that multiplied together give a triangular number (246753 = T₇₀₂).

The spelling of 1298719 in words is "one million, two hundred ninety-eight thousand, seven hundred nineteen".