1614721 has 2 divisors, whose sum is σ = 1614722. Its totient is φ = 1614720.

The previous prime is 1614719. The next prime is 1614733. The reversal of 1614721 is 1274161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1527696 + 87025 = 1236^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1614721 - 2¹ = 1614719 is a prime.

Together with 1614719, it forms a pair of twin primes.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

1614721 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1614692 and 1614701.

It is not a weakly prime, because it can be changed into another prime (1654721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807360 + 807361.

It is an arithmetic number, because the mean of its divisors is an integer number (807361).

2^1614721 is an apocalyptic number.

It is an amenable number.

1614721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1614721 is an equidigital number, since it uses as much as digits as its factorization.

1614721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 1614721 is about 1270.7167268908. The cubic root of 1614721 is about 117.3183188935.

Adding to 1614721 its reverse (1274161), we get a palindrome (2888882).

The spelling of 1614721 in words is "one million, six hundred fourteen thousand, seven hundred twenty-one".