4020685 has 8 divisors (see below), whose sum is σ = 5078880. Its totient is φ = 3047184.

The previous prime is 4020671. The next prime is 4020691. The reversal of 4020685 is 5860204.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4020685 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21067 + ... + 21256.

It is an arithmetic number, because the mean of its divisors is an integer number (634860).

Almost surely, 2^4020685 is an apocalyptic number.

It is an amenable number.

4020685 is a deficient number, since it is larger than the sum of its proper divisors (1058195).

4020685 is a wasteful number, since it uses less digits than its factorization.

4020685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42347.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4020685 is about 2005.1645817738. The cubic root of 4020685 is about 159.0132631369.

Adding to 4020685 its reverse (5860204), we get a palindrome (9880889).

The spelling of 4020685 in words is "four million, twenty thousand, six hundred eighty-five".