7217542 has 4 divisors (see below), whose sum is σ = 10826316. Its totient is φ = 3608770.

The previous prime is 7217527. The next prime is 7217557. The reversal of 7217542 is 2457127.

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

It is an interprime number because it is at equal distance from previous prime (7217527) and next prime (7217557).

It is a self number, because there is not a number n which added to its sum of digits gives 7217542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804384 + ... + 1804387.

It is an arithmetic number, because the mean of its divisors is an integer number (2706579).

Almost surely, 2^7217542 is an apocalyptic number.

7217542 is a deficient number, since it is larger than the sum of its proper divisors (3608774).

7217542 is a wasteful number, since it uses less digits than its factorization.

7217542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608773.

The product of its digits is 3920, while the sum is 28.

The square root of 7217542 is about 2686.5483431347. The cubic root of 7217542 is about 193.2545702419.

The spelling of 7217542 in words is "seven million, two hundred seventeen thousand, five hundred forty-two".