1618457 has 2 divisors, whose sum is σ = 1618458. Its totient is φ = 1618456.

The previous prime is 1618453. The next prime is 1618459. The reversal of 1618457 is 7548161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1485961 + 132496 = 1219^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1618457 - 2² = 1618453 is a prime.

Together with 1618459, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (1618453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809228 + 809229.

It is an arithmetic number, because the mean of its divisors is an integer number (809229).

2^1618457 is an apocalyptic number.

It is an amenable number.

1618457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618457 is an equidigital number, since it uses as much as digits as its factorization.

1618457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 32.

The square root of 1618457 is about 1272.1859140865. The cubic root of 1618457 is about 117.4087294843.

The spelling of 1618457 in words is "one million, six hundred eighteen thousand, four hundred fifty-seven".