26430457 has 2 divisors, whose sum is σ = 26430458. Its totient is φ = 26430456.

The previous prime is 26430431. The next prime is 26430487. The reversal of 26430457 is 75403462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26429881 + 576 = 5141^2 + 24^2 .

It is a cyclic number.

It is not a de Polignac number, because 26430457 - 2¹⁹ = 25906169 is a prime.

It is equal to p_1649740 and since 26430457 and 1649740 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (26430487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13215228 + 13215229.

It is an arithmetic number, because the mean of its divisors is an integer number (13215229).

Almost surely, 2^26430457 is an apocalyptic number.

It is an amenable number.

26430457 is a deficient number, since it is larger than the sum of its proper divisors (1).

26430457 is an equidigital number, since it uses as much as digits as its factorization.

26430457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 26430457 is about 5141.0560199243. The cubic root of 26430457 is about 297.8755730258.

The spelling of 26430457 in words is "twenty-six million, four hundred thirty thousand, four hundred fifty-seven".