2919121 has 4 divisors (see below), whose sum is σ = 3090852. Its totient is φ = 2747392.

The previous prime is 2919113. The next prime is 2919127. The reversal of 2919121 is 1219192.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1784896 + 1134225 = 1336^2 + 1065^2 .

It is a cyclic number.

It is not a de Polignac number, because 2919121 - 2³ = 2919113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2919127) 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, 85840 + ... + 85873.

It is an arithmetic number, because the mean of its divisors is an integer number (772713).

2^2919121 is an apocalyptic number.

It is an amenable number.

2919121 is a deficient number, since it is larger than the sum of its proper divisors (171731).

2919121 is a wasteful number, since it uses less digits than its factorization.

2919121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171730.

The product of its digits is 324, while the sum is 25.

The square root of 2919121 is about 1708.5435317837. The cubic root of 2919121 is about 142.9170464488.

The spelling of 2919121 in words is "two million, nine hundred nineteen thousand, one hundred twenty-one".