1979261 has 2 divisors, whose sum is σ = 1979262. Its totient is φ = 1979260.

The previous prime is 1979251. The next prime is 1979269. The reversal of 1979261 is 1629791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1038361 + 940900 = 1019^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1979261 - 2¹⁸ = 1717117 is a prime.

It is a super-2 number, since 2×1979261² = 7834948212242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1979269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989630 + 989631.

It is an arithmetic number, because the mean of its divisors is an integer number (989631).

2^1979261 is an apocalyptic number.

It is an amenable number.

1979261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979261 is an equidigital number, since it uses as much as digits as its factorization.

1979261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 35.

The square root of 1979261 is about 1406.8621112248. The cubic root of 1979261 is about 125.5550992694. Note that the first 3 decimals are identical.

The spelling of 1979261 in words is "one million, nine hundred seventy-nine thousand, two hundred sixty-one".