121256445 has 8 divisors (see below), whose sum is σ = 194010336. Its totient is φ = 64670096.

The previous prime is 121256417. The next prime is 121256449. The reversal of 121256445 is 544652121.

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

It is a cyclic number.

It is not a de Polignac number, because 121256445 - 2¹² = 121252349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121256449) 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, 4041867 + ... + 4041896.

It is an arithmetic number, because the mean of its divisors is an integer number (24251292).

Almost surely, 2^121256445 is an apocalyptic number.

121256445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121256445 is a deficient number, since it is larger than the sum of its proper divisors (72753891).

121256445 is an equidigital number, since it uses as much as digits as its factorization.

121256445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8083771.

The product of its digits is 9600, while the sum is 30.

The square root of 121256445 is about 11011.6504212584. The cubic root of 121256445 is about 494.9579190837.

The spelling of 121256445 in words is "one hundred twenty-one million, two hundred fifty-six thousand, four hundred forty-five".