7249745 has 4 divisors (see below), whose sum is σ = 8699700. Its totient is φ = 5799792.

The previous prime is 7249733. The next prime is 7249747. The reversal of 7249745 is 5479427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3775249 + 3474496 = 1943^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 7249745 - 2⁴ = 7249729 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7249699 and 7249708.

It is not an unprimeable number, because it can be changed into a prime (7249747) 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, 724970 + ... + 724979.

It is an arithmetic number, because the mean of its divisors is an integer number (2174925).

Almost surely, 2^7249745 is an apocalyptic number.

It is an amenable number.

7249745 is a deficient number, since it is larger than the sum of its proper divisors (1449955).

7249745 is a wasteful number, since it uses less digits than its factorization.

7249745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449954.

The product of its digits is 70560, while the sum is 38.

The square root of 7249745 is about 2692.5350508396. The cubic root of 7249745 is about 193.5415628702.

The spelling of 7249745 in words is "seven million, two hundred forty-nine thousand, seven hundred forty-five".