1953921 has 8 divisors (see below), whose sum is σ = 2644384. Its totient is φ = 1283040.

The previous prime is 1953911. The next prime is 1953943. The reversal of 1953921 is 1293591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1953921 - 2⁶ = 1953857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1953901) 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, 4660 + ... + 5061.

It is an arithmetic number, because the mean of its divisors is an integer number (330548).

2^1953921 is an apocalyptic number.

It is an amenable number.

1953921 is a deficient number, since it is larger than the sum of its proper divisors (690463).

1953921 is an equidigital number, since it uses as much as digits as its factorization.

1953921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9791.

The product of its digits is 2430, while the sum is 30.

The square root of 1953921 is about 1397.8272425447. The cubic root of 1953921 is about 125.0169790269.

The spelling of 1953921 in words is "one million, nine hundred fifty-three thousand, nine hundred twenty-one".