1915121 has 8 divisors (see below), whose sum is σ = 2076480. Its totient is φ = 1755792.

The previous prime is 1915117. The next prime is 1915153. The reversal of 1915121 is 1215191.

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 1915121 - 2² = 1915117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1915093 and 1915102.

It is not an unprimeable number, because it can be changed into a prime (1915321) 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, 1916 + ... + 2738.

It is an arithmetic number, because the mean of its divisors is an integer number (259560).

2^1915121 is an apocalyptic number.

It is an amenable number.

1915121 is a deficient number, since it is larger than the sum of its proper divisors (161359).

1915121 is a wasteful number, since it uses less digits than its factorization.

1915121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015.

The product of its digits is 90, while the sum is 20.

The square root of 1915121 is about 1383.8789686963. The cubic root of 1915121 is about 124.1839318564.

The spelling of 1915121 in words is "one million, nine hundred fifteen thousand, one hundred twenty-one".