7123620 has 72 divisors (see below), whose sum is σ = 23212224. Its totient is φ = 1627584.

The previous prime is 7123619. The next prime is 7123657. The reversal of 7123620 is 263217.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1729 + ... + 4151.

It is an arithmetic number, because the mean of its divisors is an integer number (322392).

Almost surely, 2^7123620 is an apocalyptic number.

7123620 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7123620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11606112).

7123620 is an abundant number, since it is smaller than the sum of its proper divisors (16088604).

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

7123620 is a wasteful number, since it uses less digits than its factorization.

7123620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 7123620 is about 2669.0110528059. The cubic root of 7123620 is about 192.4126325300.

Adding to 7123620 its reverse (263217), we get a palindrome (7386837).

The spelling of 7123620 in words is "seven million, one hundred twenty-three thousand, six hundred twenty".