1914721 has 4 divisors (see below), whose sum is σ = 1917972. Its totient is φ = 1911472.

The previous prime is 1914719. The next prime is 1914739. The reversal of 1914721 is 1274191.

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

It can be written as a sum of positive squares in 2 ways, for example, as 474721 + 1440000 = 689^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 1914721 - 2¹ = 1914719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1914751) 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, 466 + ... + 2011.

It is an arithmetic number, because the mean of its divisors is an integer number (479493).

2^1914721 is an apocalyptic number.

It is an amenable number.

1914721 is a deficient number, since it is larger than the sum of its proper divisors (3251).

1914721 is an equidigital number, since it uses as much as digits as its factorization.

1914721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250.

The product of its digits is 504, while the sum is 25.

The square root of 1914721 is about 1383.7344398402. The cubic root of 1914721 is about 124.1752853999.

The spelling of 1914721 in words is "one million, nine hundred fourteen thousand, seven hundred twenty-one".