1617172401 has 16 divisors (see below), whose sum is σ = 2337480320. Its totient is φ = 988588800.

The previous prime is 1617172397. The next prime is 1617172421. The reversal of 1617172401 is 1042717161.

It is not a de Polignac number, because 1617172401 - 2² = 1617172397 is a prime.

It is a super-2 number, since 2×1617172401² = 5230493149112209602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1617172421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131416 + ... + 143193.

It is an arithmetic number, because the mean of its divisors is an integer number (146092520).

Almost surely, 2^1617172401 is an apocalyptic number.

It is an amenable number.

1617172401 is a deficient number, since it is larger than the sum of its proper divisors (720307919).

1617172401 is a wasteful number, since it uses less digits than its factorization.

1617172401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274776.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 1617172401 is about 40214.0821230573. The cubic root of 1617172401 is about 1173.7765810832.

Adding to 1617172401 its reverse (1042717161), we get a palindrome (2659889562).

The spelling of 1617172401 in words is "one billion, six hundred seventeen million, one hundred seventy-two thousand, four hundred one".