2017642 has 8 divisors (see below), whose sum is σ = 3301632. Its totient is φ = 917100.

The previous prime is 2017637. The next prime is 2017643. The reversal of 2017642 is 2467102.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 91711 = 2017642 / (2 + 0 + 1 + 7 + 6 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (2017643) 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, 45834 + ... + 45877.

It is an arithmetic number, because the mean of its divisors is an integer number (412704).

2^2017642 is an apocalyptic number.

2017642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2017642 is a deficient number, since it is larger than the sum of its proper divisors (1283990).

2017642 is a wasteful number, since it uses less digits than its factorization.

2017642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91724.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 2017642 is about 1420.4372566221. The cubic root of 2017642 is about 126.3614798101.

The spelling of 2017642 in words is "two million, seventeen thousand, six hundred forty-two".