5121840 has 40 divisors (see below), whose sum is σ = 15878448. Its totient is φ = 1365760.

The previous prime is 5121839. The next prime is 5121841. The reversal of 5121840 is 481215.

It is an interprime number because it is at equal distance from previous prime (5121839) and next prime (5121841).

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (5121841) 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, 10431 + ... + 10910.

Almost surely, 2^5121840 is an apocalyptic number.

It is an amenable number.

5121840 is an abundant number, since it is smaller than the sum of its proper divisors (10756608).

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

5121840 is a wasteful number, since it uses less digits than its factorization.

5121840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21357 (or 21351 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 5121840 is about 2263.1482496734. The cubic root of 5121840 is about 172.3754193955.

The spelling of 5121840 in words is "five million, one hundred twenty-one thousand, eight hundred forty".