121577541 has 8 divisors (see below), whose sum is σ = 167693280. Its totient is φ = 78256752.

The previous prime is 121577539. The next prime is 121577543. The reversal of 121577541 is 145775121.

It is an interprime number because it is at equal distance from previous prime (121577539) and next prime (121577543).

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

It is not a de Polignac number, because 121577541 - 2¹ = 121577539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121577543) 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 7 ways as a sum of consecutive naturals, for example, 698635 + ... + 698808.

It is an arithmetic number, because the mean of its divisors is an integer number (20961660).

Almost surely, 2^121577541 is an apocalyptic number.

It is an amenable number.

121577541 is a deficient number, since it is larger than the sum of its proper divisors (46115739).

121577541 is a wasteful number, since it uses less digits than its factorization.

121577541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397475.

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

The square root of 121577541 is about 11026.2206127032. The cubic root of 121577541 is about 495.3944290186.

The spelling of 121577541 in words is "one hundred twenty-one million, five hundred seventy-seven thousand, five hundred forty-one".