7249999 has 4 divisors (see below), whose sum is σ = 7317864. Its totient is φ = 7182136.

The previous prime is 7249997. The next prime is 7250011. The reversal of 7249999 is 9999427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9999427 = 71 ⋅140837.

It is a cyclic number.

It is not a de Polignac number, because 7249999 - 2¹ = 7249997 is a prime.

It is a Duffinian number.

7249999 is a modest number, since divided by 9999 gives 724 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7249997) 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, 33772 + ... + 33985.

It is an arithmetic number, because the mean of its divisors is an integer number (1829466).

Almost surely, 2^7249999 is an apocalyptic number.

7249999 is a deficient number, since it is larger than the sum of its proper divisors (67865).

7249999 is a wasteful number, since it uses less digits than its factorization.

7249999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67864.

The product of its digits is 367416, while the sum is 49.

The square root of 7249999 is about 2692.5822178719. The cubic root of 7249999 is about 193.5438231328.

The spelling of 7249999 in words is "seven million, two hundred forty-nine thousand, nine hundred ninety-nine".