25042121 has 8 divisors (see below), whose sum is σ = 27371904. Its totient is φ = 22770000.

The previous prime is 25042111. The next prime is 25042123. The reversal of 25042121 is 12124052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25042121 - 2¹⁸ = 24779977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25042121.

It is not an unprimeable number, because it can be changed into a prime (25042123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13505 + ... + 15246.

It is an arithmetic number, because the mean of its divisors is an integer number (3421488).

Almost surely, 2^25042121 is an apocalyptic number.

It is an amenable number.

25042121 is a deficient number, since it is larger than the sum of its proper divisors (2329783).

25042121 is a wasteful number, since it uses less digits than its factorization.

25042121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28831.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 25042121 is about 5004.2103273144. The cubic root of 25042121 is about 292.5658984161.

Adding to 25042121 its reverse (12124052), we get a palindrome (37166173).

The spelling of 25042121 in words is "twenty-five million, forty-two thousand, one hundred twenty-one".