1518961 has 8 divisors (see below), whose sum is σ = 1587944. Its totient is φ = 1451520.

The previous prime is 1518949. The next prime is 1518971. The reversal of 1518961 is 1698151.

It can be written as a sum of positive squares in 4 ways, for example, as 78961 + 1440000 = 281^2 + 1200^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1518961 - 2⁹ = 1518449 is a prime.

It is a Duffinian number.

1518961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1518901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1921 + ... + 2593.

It is an arithmetic number, because the mean of its divisors is an integer number (198493).

2^1518961 is an apocalyptic number.

It is an amenable number.

1518961 is a deficient number, since it is larger than the sum of its proper divisors (68983).

1518961 is an equidigital number, since it uses as much as digits as its factorization.

1518961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771.

The product of its digits is 2160, while the sum is 31.

The square root of 1518961 is about 1232.4613584206. The cubic root of 1518961 is about 114.9517377826.

The spelling of 1518961 in words is "one million, five hundred eighteen thousand, nine hundred sixty-one".