981121541 has 8 divisors (see below), whose sum is σ = 991536000. Its totient is φ = 970762320.

The previous prime is 981121517. The next prime is 981121553. The reversal of 981121541 is 145121189.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981121541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 981121498 and 981121507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981121501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22400 + ... + 49638.

It is an arithmetic number, because the mean of its divisors is an integer number (123942000).

Almost surely, 2^981121541 is an apocalyptic number.

It is an amenable number.

981121541 is a deficient number, since it is larger than the sum of its proper divisors (10414459).

981121541 is a wasteful number, since it uses less digits than its factorization.

981121541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27619.

The product of its digits is 2880, while the sum is 32.

The square root of 981121541 is about 31322.8597193807. The cubic root of 981121541 is about 993.6671601318.

The spelling of 981121541 in words is "nine hundred eighty-one million, one hundred twenty-one thousand, five hundred forty-one".