1921127 has 4 divisors (see below), whose sum is σ = 2068920. Its totient is φ = 1773336.

The previous prime is 1921123. The next prime is 1921133. The reversal of 1921127 is 7211291.

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

It is a cyclic number.

It is not a de Polignac number, because 1921127 - 2² = 1921123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73877 + ... + 73902.

It is an arithmetic number, because the mean of its divisors is an integer number (517230).

2^1921127 is an apocalyptic number.

1921127 is a deficient number, since it is larger than the sum of its proper divisors (147793).

1921127 is a wasteful number, since it uses less digits than its factorization.

1921127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147792.

The product of its digits is 252, while the sum is 23.

The square root of 1921127 is about 1386.0472574916. The cubic root of 1921127 is about 124.3136138915.

It can be divided in two parts, 1921 and 127, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1921127 in words is "one million, nine hundred twenty-one thousand, one hundred twenty-seven".