121273743 has 4 divisors (see below), whose sum is σ = 161698328. Its totient is φ = 80849160.

The previous prime is 121273723. The next prime is 121273781. The reversal of 121273743 is 347372121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121273743 - 2¹⁴ = 121257359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121273743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121273703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20212288 + ... + 20212293.

It is an arithmetic number, because the mean of its divisors is an integer number (40424582).

Almost surely, 2^121273743 is an apocalyptic number.

121273743 is a deficient number, since it is larger than the sum of its proper divisors (40424585).

121273743 is an equidigital number, since it uses as much as digits as its factorization.

121273743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40424584.

The product of its digits is 7056, while the sum is 30.

The square root of 121273743 is about 11012.4358340923. The cubic root of 121273743 is about 494.9814542587.

The spelling of 121273743 in words is "one hundred twenty-one million, two hundred seventy-three thousand, seven hundred forty-three".