121256741 has 4 divisors (see below), whose sum is σ = 123312000. Its totient is φ = 119201484.

The previous prime is 121256719. The next prime is 121256747. The reversal of 121256741 is 147652121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 147652121 = 67 ⋅2203763.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121256741 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121256747) 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, 1027541 + ... + 1027658.

It is an arithmetic number, because the mean of its divisors is an integer number (30828000).

Almost surely, 2^121256741 is an apocalyptic number.

It is an amenable number.

121256741 is a deficient number, since it is larger than the sum of its proper divisors (2055259).

121256741 is an equidigital number, since it uses as much as digits as its factorization.

121256741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055258.

The product of its digits is 3360, while the sum is 29.

The square root of 121256741 is about 11011.6638615606. The cubic root of 121256741 is about 494.9583218318.

The spelling of 121256741 in words is "one hundred twenty-one million, two hundred fifty-six thousand, seven hundred forty-one".