121456745 has 8 divisors (see below), whose sum is σ = 146075400. Its totient is φ = 96947200.

The previous prime is 121456739. The next prime is 121456763. The reversal of 121456745 is 547654121.

It can be written as a sum of positive squares in 4 ways, for example, as 31225744 + 90231001 = 5588^2 + 9499^2 .

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

It is not a de Polignac number, because 121456745 - 2¹² = 121452649 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24806 + ... + 29295.

It is an arithmetic number, because the mean of its divisors is an integer number (18259425).

Almost surely, 2^121456745 is an apocalyptic number.

It is an amenable number.

121456745 is a deficient number, since it is larger than the sum of its proper divisors (24618655).

121456745 is an equidigital number, since it uses as much as digits as its factorization.

121456745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54555.

The product of its digits is 33600, while the sum is 35.

The square root of 121456745 is about 11020.7415812186. The cubic root of 121456745 is about 495.2303046941.

The spelling of 121456745 in words is "one hundred twenty-one million, four hundred fifty-six thousand, seven hundred forty-five".