1617541 has 2 divisors, whose sum is σ = 1617542. Its totient is φ = 1617540.

The previous prime is 1617523. The next prime is 1617547. The reversal of 1617541 is 1457161.

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., 1552516 + 65025 = 1246^2 + 255^2 .

It is an emirp because it is prime and its reverse (1457161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1617541 - 2⁵ = 1617509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1617547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808770 + 808771.

It is an arithmetic number, because the mean of its divisors is an integer number (808771).

2^1617541 is an apocalyptic number.

It is an amenable number.

1617541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617541 is an equidigital number, since it uses as much as digits as its factorization.

1617541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 25.

The square root of 1617541 is about 1271.8258528588. The cubic root of 1617541 is about 117.3865753189.

The spelling of 1617541 in words is "one million, six hundred seventeen thousand, five hundred forty-one".