7251643 has 4 divisors (see below), whose sum is σ = 8287600. Its totient is φ = 6215688.

The previous prime is 7251637. The next prime is 7251691. The reversal of 7251643 is 3461527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3461527 = 29 ⋅119363.

It is a cyclic number.

It is not a de Polignac number, because 7251643 - 2¹³ = 7243451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7251143) 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, 517968 + ... + 517981.

It is an arithmetic number, because the mean of its divisors is an integer number (2071900).

Almost surely, 2^7251643 is an apocalyptic number.

7251643 is a deficient number, since it is larger than the sum of its proper divisors (1035957).

7251643 is a wasteful number, since it uses less digits than its factorization.

7251643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035956.

The product of its digits is 5040, while the sum is 28.

The square root of 7251643 is about 2692.8874837245. The cubic root of 7251643 is about 193.5584512727.

It can be divided in two parts, 72 and 51643, that added together give a palindrome (51715).

The spelling of 7251643 in words is "seven million, two hundred fifty-one thousand, six hundred forty-three".