1948721 has 8 divisors (see below), whose sum is σ = 2048640. Its totient is φ = 1850112.

The previous prime is 1948703. The next prime is 1948729. The reversal of 1948721 is 1278491.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1948721 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1948729) 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, 4220 + ... + 4658.

It is an arithmetic number, because the mean of its divisors is an integer number (256080).

2^1948721 is an apocalyptic number.

It is an amenable number.

1948721 is a deficient number, since it is larger than the sum of its proper divisors (99919).

1948721 is a wasteful number, since it uses less digits than its factorization.

1948721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its digits is 4032, while the sum is 32.

The square root of 1948721 is about 1395.9659737974. The cubic root of 1948721 is about 124.9059772956.

The spelling of 1948721 in words is "one million, nine hundred forty-eight thousand, seven hundred twenty-one".