1054891 has 4 divisors (see below), whose sum is σ = 1057432. Its totient is φ = 1052352.

The previous prime is 1054853. The next prime is 1054903. The reversal of 1054891 is 1984501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1984501 = 103 ⋅19267.

It is a cyclic number.

It is not a de Polignac number, because 1054891 - 2¹⁵ = 1022123 is a prime.

It is a super-2 number, since 2×1054891² = 2225590043762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1054831) 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, 486 + ... + 1531.

It is an arithmetic number, because the mean of its divisors is an integer number (264358).

2^1054891 is an apocalyptic number.

1054891 is a deficient number, since it is larger than the sum of its proper divisors (2541).

1054891 is an equidigital number, since it uses as much as digits as its factorization.

1054891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1054891 is about 1027.0788674683. The cubic root of 1054891 is about 101.7972069744.

Adding to 1054891 its product of nonzero digits (1440), we get a triangular number (1056331 = T₁₄₅₃).

The spelling of 1054891 in words is "one million, fifty-four thousand, eight hundred ninety-one".