4721387 has 4 divisors (see below), whose sum is σ = 5150616. Its totient is φ = 4292160.

The previous prime is 4721383. The next prime is 4721407. The reversal of 4721387 is 7831274.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4721387 - 2² = 4721383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4721383) 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, 214598 + ... + 214619.

It is an arithmetic number, because the mean of its divisors is an integer number (1287654).

Almost surely, 2^4721387 is an apocalyptic number.

4721387 is a deficient number, since it is larger than the sum of its proper divisors (429229).

4721387 is a wasteful number, since it uses less digits than its factorization.

4721387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429228.

The product of its digits is 9408, while the sum is 32.

The square root of 4721387 is about 2172.8752840419. The cubic root of 4721387 is about 167.7605597907.

The spelling of 4721387 in words is "four million, seven hundred twenty-one thousand, three hundred eighty-seven".