7123641 has 32 divisors (see below), whose sum is σ = 11332608. Its totient is φ = 3896640.

The previous prime is 7123619. The next prime is 7123657. The reversal of 7123641 is 1463217.

It is not a de Polignac number, because 7123641 - 2⁷ = 7123513 is a prime.

It is a super-2 number, since 2×7123641² = 101492522193762, which contains 22 as substring.

7123641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7123661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85786 + ... + 85868.

It is an arithmetic number, because the mean of its divisors is an integer number (354144).

Almost surely, 2^7123641 is an apocalyptic number.

It is an amenable number.

7123641 is a deficient number, since it is larger than the sum of its proper divisors (4208967).

7123641 is a wasteful number, since it uses less digits than its factorization.

7123641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its digits is 1008, while the sum is 24.

The square root of 7123641 is about 2669.0149868444. The cubic root of 7123641 is about 192.4128216034.

Adding to 7123641 its reverse (1463217), we get a palindrome (8586858).

The spelling of 7123641 in words is "seven million, one hundred twenty-three thousand, six hundred forty-one".