25143012 has 18 divisors (see below), whose sum is σ = 63556038. Its totient is φ = 8380992.

The previous prime is 25142989. The next prime is 25143031. The reversal of 25143012 is 21034152.

It can be written as a sum of positive squares in only one way, i.e., 18455616 + 6687396 = 4296^2 + 2586^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×25143012³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 349173 + ... + 349244.

It is an arithmetic number, because the mean of its divisors is an integer number (3530891).

Almost surely, 2^25143012 is an apocalyptic number.

It is an amenable number.

25143012 is an abundant number, since it is smaller than the sum of its proper divisors (38413026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25143012 is a wasteful number, since it uses less digits than its factorization.

25143012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698427 (or 698422 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 25143012 is about 5014.2808058584. The cubic root of 25143012 is about 292.9582735176.

Adding to 25143012 its reverse (21034152), we get a palindrome (46177164).

The spelling of 25143012 in words is "twenty-five million, one hundred forty-three thousand, twelve".