26245821 has 24 divisors (see below), whose sum is σ = 42854880. Its totient is φ = 14206752.

The previous prime is 26245811. The next prime is 26245823. The reversal of 26245821 is 12854262.

It is not a de Polignac number, because 26245821 - 2¹⁵ = 26213053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26245823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1906 + ... + 7491.

It is an arithmetic number, because the mean of its divisors is an integer number (1785620).

Almost surely, 2^26245821 is an apocalyptic number.

26245821 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26245821 is a deficient number, since it is larger than the sum of its proper divisors (16609059).

26245821 is a wasteful number, since it uses less digits than its factorization.

26245821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9433 (or 9426 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 26245821 is about 5123.0675381064. The cubic root of 26245821 is about 297.1803255949.

The spelling of 26245821 in words is "twenty-six million, two hundred forty-five thousand, eight hundred twenty-one".