121775541 has 16 divisors (see below), whose sum is σ = 171494400. Its totient is φ = 76649328.

The previous prime is 121775531. The next prime is 121775551. The reversal of 121775541 is 145577121.

It is an interprime number because it is at equal distance from previous prime (121775531) and next prime (121775551).

It is not a de Polignac number, because 121775541 - 2⁶ = 121775477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121775531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14020 + ... + 20978.

It is an arithmetic number, because the mean of its divisors is an integer number (10718400).

Almost surely, 2^121775541 is an apocalyptic number.

It is an amenable number.

121775541 is a deficient number, since it is larger than the sum of its proper divisors (49718859).

121775541 is a wasteful number, since it uses less digits than its factorization.

121775541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7288.

The product of its digits is 9800, while the sum is 33.

The square root of 121775541 is about 11035.1955578503. The cubic root of 121775541 is about 495.6632146727.

The spelling of 121775541 in words is "one hundred twenty-one million, seven hundred seventy-five thousand, five hundred forty-one".