26429621 has 2 divisors, whose sum is σ = 26429622. Its totient is φ = 26429620.

The previous prime is 26429617. The next prime is 26429633. The reversal of 26429621 is 12692462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25959025 + 470596 = 5095^2 + 686^2 .

It is a cyclic number.

It is not a de Polignac number, because 26429621 - 2² = 26429617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26429671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13214810 + 13214811.

It is an arithmetic number, because the mean of its divisors is an integer number (13214811).

Almost surely, 2^26429621 is an apocalyptic number.

It is an amenable number.

26429621 is a deficient number, since it is larger than the sum of its proper divisors (1).

26429621 is an equidigital number, since it uses as much as digits as its factorization.

26429621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 26429621 is about 5140.9747130286. The cubic root of 26429621 is about 297.8724323738.

The spelling of 26429621 in words is "twenty-six million, four hundred twenty-nine thousand, six hundred twenty-one".