25032121 has 4 divisors (see below), whose sum is σ = 25042212. Its totient is φ = 25022032.

The previous prime is 25032083. The next prime is 25032127. The reversal of 25032121 is 12123052.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 7096896 + 17935225 = 2664^2 + 4235^2 .

It is a cyclic number.

It is not a de Polignac number, because 25032121 - 2¹¹ = 25030073 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25032095 and 25032104.

It is not an unprimeable number, because it can be changed into a prime (25032127) 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, 1551 + ... + 7243.

It is an arithmetic number, because the mean of its divisors is an integer number (6260553).

Almost surely, 2^25032121 is an apocalyptic number.

It is an amenable number.

25032121 is a deficient number, since it is larger than the sum of its proper divisors (10091).

25032121 is an equidigital number, since it uses as much as digits as its factorization.

25032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10090.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 25032121 is about 5003.2110689036. The cubic root of 25032121 is about 292.5269500578.

Adding to 25032121 its reverse (12123052), we get a palindrome (37155173).

It can be divided in two parts, 2503 and 2121, that added together give a square (4624 = 68²).

The spelling of 25032121 in words is "twenty-five million, thirty-two thousand, one hundred twenty-one".