1616961 has 4 divisors (see below), whose sum is σ = 2155952. Its totient is φ = 1077972.

The previous prime is 1616947. The next prime is 1616963. The reversal of 1616961 is 1696161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1696161 = 3 ⋅565387.

It is not a de Polignac number, because 1616961 - 2⁶ = 1616897 is a prime.

It is a super-2 number, since 2×1616961² = 5229125751042, which contains 22 as substring.

It is a D-number.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616963) 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, 269491 + ... + 269496.

It is an arithmetic number, because the mean of its divisors is an integer number (538988).

2^1616961 is an apocalyptic number.

It is an amenable number.

1616961 is a deficient number, since it is larger than the sum of its proper divisors (538991).

1616961 is an equidigital number, since it uses as much as digits as its factorization.

1616961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538990.

The product of its digits is 1944, while the sum is 30.

The square root of 1616961 is about 1271.5978137760. The cubic root of 1616961 is about 117.3725432474.

The spelling of 1616961 in words is "one million, six hundred sixteen thousand, nine hundred sixty-one".