4251240 has 144 divisors (see below), whose sum is σ = 16138980. Its totient is φ = 967680.

The previous prime is 4251239. The next prime is 4251253. The reversal of 4251240 is 421524.

4251240 is a `hidden beast` number, since 425 + 1 + 240 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4235364 + 15876 = 2058^2 + 126^2 .

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17520 + ... + 17760.

Almost surely, 2^4251240 is an apocalyptic number.

4251240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4251240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8069490).

4251240 is an abundant number, since it is smaller than the sum of its proper divisors (11887740).

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

4251240 is a wasteful number, since it uses less digits than its factorization.

4251240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 4251240 is about 2061.8535350504. The cubic root of 4251240 is about 161.9963419384.

Adding to 4251240 its reverse (421524), we get a palindrome (4672764).

The spelling of 4251240 in words is "four million, two hundred fifty-one thousand, two hundred forty".