4001615 has 8 divisors (see below), whose sum is σ = 4825968. Its totient is φ = 3185280.

The previous prime is 4001611. The next prime is 4001617. The reversal of 4001615 is 5161004.

It is a happy number.

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

It is not a de Polignac number, because 4001615 - 2² = 4001611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4001593 and 4001602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842 + ... + 2951.

It is an arithmetic number, because the mean of its divisors is an integer number (603246).

Almost surely, 2^4001615 is an apocalyptic number.

4001615 is a deficient number, since it is larger than the sum of its proper divisors (824353).

4001615 is a wasteful number, since it uses less digits than its factorization.

4001615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 4001615 is about 2000.4037092547. The cubic root of 4001615 is about 158.7614660947.

Adding to 4001615 its reverse (5161004), we get a palindrome (9162619).

The spelling of 4001615 in words is "four million, one thousand, six hundred fifteen".