7140921 has 8 divisors (see below), whose sum is σ = 9576960. Its totient is φ = 4732752.

The previous prime is 7140911. The next prime is 7140923. The reversal of 7140921 is 1290417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7140921 - 2⁶ = 7140857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7140891 and 7140900.

It is not an unprimeable number, because it can be changed into a prime (7140923) 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, 6361 + ... + 7398.

It is an arithmetic number, because the mean of its divisors is an integer number (1197120).

Almost surely, 2^7140921 is an apocalyptic number.

It is an amenable number.

7140921 is a deficient number, since it is larger than the sum of its proper divisors (2436039).

7140921 is a wasteful number, since it uses less digits than its factorization.

7140921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13935.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 7140921 is about 2672.2501754140. The cubic root of 7140921 is about 192.5682762250.

Subtracting from 7140921 its product of nonzero digits (504), we obtain a palindrome (7140417).

The spelling of 7140921 in words is "seven million, one hundred forty thousand, nine hundred twenty-one".