121570561 has 8 divisors (see below), whose sum is σ = 143419904. Its totient is φ = 100841760.

The previous prime is 121570549. The next prime is 121570577. The reversal of 121570561 is 165075121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121570561 - 2¹³ = 121562369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121570541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279900 + ... + 280333.

It is an arithmetic number, because the mean of its divisors is an integer number (17927488).

Almost surely, 2^121570561 is an apocalyptic number.

It is an amenable number.

121570561 is a deficient number, since it is larger than the sum of its proper divisors (21849343).

121570561 is an equidigital number, since it uses as much as digits as its factorization.

121570561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560271.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 121570561 is about 11025.9040899148. The cubic root of 121570561 is about 495.3849483222.

The spelling of 121570561 in words is "one hundred twenty-one million, five hundred seventy thousand, five hundred sixty-one".