1616601 has 16 divisors (see below), whose sum is σ = 2571264. Its totient is φ = 883344.

The previous prime is 1616597. The next prime is 1616603. The reversal of 1616601 is 1066161.

It is not a de Polignac number, because 1616601 - 2² = 1616597 is a prime.

It is a super-2 number, since 2×1616601² = 5226797586402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1616603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1191 + ... + 2156.

It is an arithmetic number, because the mean of its divisors is an integer number (160704).

2^1616601 is an apocalyptic number.

It is an amenable number.

1616601 is a deficient number, since it is larger than the sum of its proper divisors (954663).

1616601 is a wasteful number, since it uses less digits than its factorization.

1616601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1616601 is about 1271.4562517051. The cubic root of 1616601 is about 117.3638319980.

The spelling of 1616601 in words is "one million, six hundred sixteen thousand, six hundred one".