2891842 has 4 divisors (see below), whose sum is σ = 4337766. Its totient is φ = 1445920.

The previous prime is 2891831. The next prime is 2891891. The reversal of 2891842 is 2481982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2481982 = 2 ⋅1240991.

It can be written as a sum of positive squares in only one way, i.e., 2468041 + 423801 = 1571^2 + 651^2 .

It is a d-powerful number, because it can be written as 2¹⁰ + 8² + 9⁶ + 1 + 8⁶ + 4² + 2²¹ .

It is a junction number, because it is equal to n+sod(n) for n = 2891798 and 2891807.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722959 + ... + 722962.

2^2891842 is an apocalyptic number.

2891842 is a deficient number, since it is larger than the sum of its proper divisors (1445924).

2891842 is a wasteful number, since it uses less digits than its factorization.

2891842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445923.

The product of its digits is 9216, while the sum is 34.

The square root of 2891842 is about 1700.5416784072. The cubic root of 2891842 is about 142.4704688985.

The spelling of 2891842 in words is "two million, eight hundred ninety-one thousand, eight hundred forty-two".