7167421 has 12 divisors (see below), whose sum is σ = 7943292. Its totient is φ = 6444416.

The previous prime is 7167409. The next prime is 7167431. The reversal of 7167421 is 1247617.

It can be written as a sum of positive squares in 2 ways, for example, as 4575321 + 2592100 = 2139^2 + 1610^2 .

It is not a de Polignac number, because 7167421 - 2⁹ = 7166909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7167421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7167431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8595 + ... + 9391.

It is an arithmetic number, because the mean of its divisors is an integer number (661941).

Almost surely, 2^7167421 is an apocalyptic number.

It is an amenable number.

7167421 is a deficient number, since it is larger than the sum of its proper divisors (775871).

7167421 is a wasteful number, since it uses less digits than its factorization.

7167421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 837 counting only the distinct ones).

The product of its digits is 2352, while the sum is 28.

The square root of 7167421 is about 2677.2039518871. The cubic root of 7167421 is about 192.8061895048.

The spelling of 7167421 in words is "seven million, one hundred sixty-seven thousand, four hundred twenty-one".