26925721 has 3 divisors (see below), whose sum is σ = 26930911. Its totient is φ = 26920532.

The previous prime is 26925707. The next prime is 26925727. The reversal of 26925721 is 12752962.

The square root of 26925721 is 5189.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12752962 = 2 ⋅6376481.

It can be written as a sum of positive squares in only one way, i.e., 21261321 + 5664400 = 4611^2 + 2380^2 .

It is not a de Polignac number, because 26925721 - 2¹³ = 26917529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26925727) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2595 + ... + 7783.

Almost surely, 2^26925721 is an apocalyptic number.

26925721 is the 5189-th square number.

26925721 is the 2595-th centered octagonal number.

It is an amenable number.

26925721 is a deficient number, since it is larger than the sum of its proper divisors (5190).

26925721 is an frugal number, since it uses more digits than its factorization.

26925721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10378 (or 5189 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The cubic root of 26925721 is about 299.7246399260.

The spelling of 26925721 in words is "twenty-six million, nine hundred twenty-five thousand, seven hundred twenty-one".