1516481 has 4 divisors (see below), whose sum is σ = 1551792. Its totient is φ = 1481172.

The previous prime is 1516441. The next prime is 1516483. The reversal of 1516481 is 1846151.

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: 1846151 = 79 ⋅23369.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1516481 is a prime.

It is a super-2 number, since 2×1516481² = 4599429246722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1516481.

It is not an unprimeable number, because it can be changed into a prime (1516483) 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, 17591 + ... + 17676.

It is an arithmetic number, because the mean of its divisors is an integer number (387948).

2^1516481 is an apocalyptic number.

It is an amenable number.

1516481 is a deficient number, since it is larger than the sum of its proper divisors (35311).

1516481 is an equidigital number, since it uses as much as digits as its factorization.

1516481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35310.

The product of its digits is 960, while the sum is 26.

The square root of 1516481 is about 1231.4548306779. The cubic root of 1516481 is about 114.8891433292.

The spelling of 1516481 in words is "one million, five hundred sixteen thousand, four hundred eighty-one".