7423645 has 8 divisors (see below), whose sum is σ = 9432504. Its totient is φ = 5589504.

The previous prime is 7423631. The next prime is 7423673. The reversal of 7423645 is 5463247.

It can be written as a sum of positive squares in 4 ways, for example, as 674041 + 6749604 = 821^2 + 2598^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7423645 - 2¹⁷ = 7292573 is a prime.

It is a super-2 number, since 2×7423645² = 110221010172050, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43584 + ... + 43753.

It is an arithmetic number, because the mean of its divisors is an integer number (1179063).

Almost surely, 2^7423645 is an apocalyptic number.

It is an amenable number.

7423645 is a deficient number, since it is larger than the sum of its proper divisors (2008859).

7423645 is a wasteful number, since it uses less digits than its factorization.

7423645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87359.

The product of its digits is 20160, while the sum is 31.

The square root of 7423645 is about 2724.6366730263. The cubic root of 7423645 is about 195.0768489562.

The spelling of 7423645 in words is "seven million, four hundred twenty-three thousand, six hundred forty-five".