26464021 has 4 divisors (see below), whose sum is σ = 26487052. Its totient is φ = 26440992.

The previous prime is 26463959. The next prime is 26464051. The reversal of 26464021 is 12046462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8059921 + 18404100 = 2839^2 + 4290^2 .

It is a 4-Lehmer number, since φ(26464021) divides (26464021-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 26464021 - 2¹¹ = 26461973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26464051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9696 + ... + 12121.

It is an arithmetic number, because the mean of its divisors is an integer number (6621763).

Almost surely, 2^26464021 is an apocalyptic number.

It is an amenable number.

26464021 is a deficient number, since it is larger than the sum of its proper divisors (23031).

26464021 is a wasteful number, since it uses less digits than its factorization.

26464021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23030.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 26464021 is about 5144.3192941341. The cubic root of 26464021 is about 298.0016102791.

The spelling of 26464021 in words is "twenty-six million, four hundred sixty-four thousand, twenty-one".