24990001 has 3 divisors (see below), whose sum is σ = 24995001. Its totient is φ = 24985002.

The previous prime is 24989971. The next prime is 24990037. The reversal of 24990001 is 10009942.

The square root of 24990001 is 4999.

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: 10009942 = 2 ⋅5004971.

It is not a de Polignac number, because 24990001 - 2⁵ = 24989969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24990071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2500 + ... + 7498.

It is an arithmetic number, because the mean of its divisors is an integer number (8331667).

Almost surely, 2^24990001 is an apocalyptic number.

24990001 is the 4999-th square number.

24990001 is the 2500-th centered octagonal number.

It is an amenable number.

24990001 is a deficient number, since it is larger than the sum of its proper divisors (5000).

24990001 is an frugal number, since it uses more digits than its factorization.

24990001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9998 (or 4999 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The cubic root of 24990001 is about 292.3627856184.

Multiplying 24990001 by its sum of digits (25), we get a square (624750025 = 24995²).

Adding to 24990001 its reverse (10009942), we get a palindrome (34999943).

It can be divided in two parts, 24 and 990001, that added together give a square (990025 = 995²).

The spelling of 24990001 in words is "twenty-four million, nine hundred ninety thousand, one".