121352605 has 16 divisors (see below), whose sum is σ = 159076224. Its totient is φ = 88137280.

The previous prime is 121352593. The next prime is 121352633. The reversal of 121352605 is 506253121.

It is not a de Polignac number, because 121352605 - 2¹⁷ = 121221533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121352605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74712 + ... + 76318.

It is an arithmetic number, because the mean of its divisors is an integer number (9942264).

Almost surely, 2^121352605 is an apocalyptic number.

It is an amenable number.

121352605 is a deficient number, since it is larger than the sum of its proper divisors (37723619).

121352605 is a wasteful number, since it uses less digits than its factorization.

121352605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 121352605 is about 11016.0158405841. The cubic root of 121352605 is about 495.0887233407.

The spelling of 121352605 in words is "one hundred twenty-one million, three hundred fifty-two thousand, six hundred five".