17121057 has 16 divisors (see below), whose sum is σ = 24261120. Its totient is φ = 10702592.

The previous prime is 17121017. The next prime is 17121059. The reversal of 17121057 is 75012171.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 17121057 - 2¹¹ = 17119009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17121059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19408 + ... + 20270.

It is an arithmetic number, because the mean of its divisors is an integer number (1516320).

Almost surely, 2^17121057 is an apocalyptic number.

17121057 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

17121057 is a deficient number, since it is larger than the sum of its proper divisors (7140063).

17121057 is a wasteful number, since it uses less digits than its factorization.

17121057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272.

The product of its (nonzero) digits is 490, while the sum is 24.

The square root of 17121057 is about 4137.7599012026. The cubic root of 17121057 is about 257.7370525748.

The spelling of 17121057 in words is "seventeen million, one hundred twenty-one thousand, fifty-seven".