121457843 has 16 divisors (see below), whose sum is σ = 141726816. Its totient is φ = 103057920.

The previous prime is 121457807. The next prime is 121457851. The reversal of 121457843 is 348754121.

It is a cyclic number.

It is not a de Polignac number, because 121457843 - 2¹² = 121453747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121457803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3113 + ... + 15893.

It is an arithmetic number, because the mean of its divisors is an integer number (8857926).

Almost surely, 2^121457843 is an apocalyptic number.

121457843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121457843 is a deficient number, since it is larger than the sum of its proper divisors (20268973).

121457843 is a wasteful number, since it uses less digits than its factorization.

121457843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12854.

The product of its digits is 26880, while the sum is 35.

The square root of 121457843 is about 11020.7913962655. The cubic root of 121457843 is about 495.2317970257.

The spelling of 121457843 in words is "one hundred twenty-one million, four hundred fifty-seven thousand, eight hundred forty-three".