7140021 has 16 divisors (see below), whose sum is σ = 11134464. Its totient is φ = 3984624.

The previous prime is 7140011. The next prime is 7140031. The reversal of 7140021 is 1200417.

7140021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7140011) and next prime (7140031).

It is not a de Polignac number, because 7140021 - 2¹⁹ = 6615733 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7140011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3051 + ... + 4856.

It is an arithmetic number, because the mean of its divisors is an integer number (695904).

Almost surely, 2^7140021 is an apocalyptic number.

It is an amenable number.

7140021 is a deficient number, since it is larger than the sum of its proper divisors (3994443).

7140021 is a wasteful number, since it uses less digits than its factorization.

7140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7960.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 7140021 is about 2672.0817727008. The cubic root of 7140021 is about 192.5601858246.

Adding to 7140021 its reverse (1200417), we get a palindrome (8340438).

The spelling of 7140021 in words is "seven million, one hundred forty thousand, twenty-one".