5121240 has 32 divisors (see below), whose sum is σ = 15364080. Its totient is φ = 1365632.

The previous prime is 5121227. The next prime is 5121247. The reversal of 5121240 is 421215.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5121247) 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, 21219 + ... + 21458.

Almost surely, 2^5121240 is an apocalyptic number.

It is an amenable number.

5121240 is an abundant number, since it is smaller than the sum of its proper divisors (10242840).

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

5121240 is a wasteful number, since it uses less digits than its factorization.

5121240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42691 (or 42687 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 5121240 is about 2263.0156870866. The cubic root of 5121240 is about 172.3686881368.

Adding to 5121240 its reverse (421215), we get a palindrome (5542455).

The spelling of 5121240 in words is "five million, one hundred twenty-one thousand, two hundred forty".