7249918 has 8 divisors (see below), whose sum is σ = 11711448. Its totient is φ = 3346104.

The previous prime is 7249901. The next prime is 7249919. The reversal of 7249918 is 8199427.

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

It is a super-2 number, since 2×7249918² = 105122622013448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7249919) 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, 139396 + ... + 139447.

It is an arithmetic number, because the mean of its divisors is an integer number (1463931).

Almost surely, 2^7249918 is an apocalyptic number.

7249918 is a deficient number, since it is larger than the sum of its proper divisors (4461530).

7249918 is a wasteful number, since it uses less digits than its factorization.

7249918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278858.

The product of its digits is 36288, while the sum is 40.

The square root of 7249918 is about 2692.5671765065. The cubic root of 7249918 is about 193.5431023461.

The spelling of 7249918 in words is "seven million, two hundred forty-nine thousand, nine hundred eighteen".