121570345 has 16 divisors (see below), whose sum is σ = 161355600. Its totient is φ = 87346944.

The previous prime is 121570333. The next prime is 121570357. The reversal of 121570345 is 543075121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121570333) and next prime (121570357).

It can be written as a sum of positive squares in 8 ways, for example, as 1382976 + 120187369 = 1176^2 + 10963^2 .

It is a cyclic number.

It is not a de Polignac number, because 121570345 - 2¹⁷ = 121439273 is a prime.

It is an unprimeable number.

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, 22870 + ... + 27679.

It is an arithmetic number, because the mean of its divisors is an integer number (10084725).

Almost surely, 2^121570345 is an apocalyptic number.

It is an amenable number.

121570345 is a deficient number, since it is larger than the sum of its proper divisors (39785255).

121570345 is a wasteful number, since it uses less digits than its factorization.

121570345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50604.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 121570345 is about 11025.8942947953. The cubic root of 121570345 is about 495.3846549309.

The spelling of 121570345 in words is "one hundred twenty-one million, five hundred seventy thousand, three hundred forty-five".