1979251 has 2 divisors, whose sum is σ = 1979252. Its totient is φ = 1979250.

The previous prime is 1979233. The next prime is 1979261. The reversal of 1979251 is 1529791.

It is a strong prime.

It is an emirp because it is prime and its reverse (1529791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1979251 - 2¹¹ = 1977203 is a prime.

It is an Ulam number.

1979251 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1979261) 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, 989625 + 989626.

It is an arithmetic number, because the mean of its divisors is an integer number (989626).

2^1979251 is an apocalyptic number.

1979251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979251 is an equidigital number, since it uses as much as digits as its factorization.

1979251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 34.

The square root of 1979251 is about 1406.8585572118. The cubic root of 1979251 is about 125.5548878179.

The spelling of 1979251 in words is "one million, nine hundred seventy-nine thousand, two hundred fifty-one".