7642553 has 4 divisors (see below), whose sum is σ = 7666980. Its totient is φ = 7618128.

The previous prime is 7642543. The next prime is 7642561. The reversal of 7642553 is 3552467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3552467 = 821 ⋅4327.

It can be written as a sum of positive squares in 2 ways, for example, as 2274064 + 5368489 = 1508^2 + 2317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7642553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7642513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11738 + ... + 12371.

It is an arithmetic number, because the mean of its divisors is an integer number (1916745).

Almost surely, 2^7642553 is an apocalyptic number.

It is an amenable number.

7642553 is a deficient number, since it is larger than the sum of its proper divisors (24427).

7642553 is a wasteful number, since it uses less digits than its factorization.

7642553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24426.

The product of its digits is 25200, while the sum is 32.

The square root of 7642553 is about 2764.5167751345. The cubic root of 7642553 is about 196.9757758356.

The spelling of 7642553 in words is "seven million, six hundred forty-two thousand, five hundred fifty-three".