1616121 has 24 divisors (see below), whose sum is σ = 2649920. Its totient is φ = 940896.

The previous prime is 1616119. The next prime is 1616161. The reversal of 1616121 is 1216161.

It is not a de Polignac number, because 1616121 - 2¹ = 1616119 is a prime.

It is a super-2 number, since 2×1616121² = 5223694173282, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1616094 and 1616103.

It is not an unprimeable number, because it can be changed into a prime (1616161) 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 23 ways as a sum of consecutive naturals, for example, 1860 + ... + 2586.

2^1616121 is an apocalyptic number.

It is an amenable number.

1616121 is a deficient number, since it is larger than the sum of its proper divisors (1033799).

1616121 is a wasteful number, since it uses less digits than its factorization.

1616121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 762 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1616121 is about 1271.2674777560. The cubic root of 1616121 is about 117.3522149868.

The spelling of 1616121 in words is "one million, six hundred sixteen thousand, one hundred twenty-one".