131121541 has 8 divisors (see below), whose sum is σ = 133832160. Its totient is φ = 128427312.

The previous prime is 131121539. The next prime is 131121559. The reversal of 131121541 is 145121131.

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

It is a cyclic number.

It is not a de Polignac number, because 131121541 - 2¹ = 131121539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121511) 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, 12771 + ... + 20623.

It is an arithmetic number, because the mean of its divisors is an integer number (16729020).

Almost surely, 2^131121541 is an apocalyptic number.

It is an amenable number.

131121541 is a deficient number, since it is larger than the sum of its proper divisors (2710619).

131121541 is an equidigital number, since it uses as much as digits as its factorization.

131121541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8195.

The product of its digits is 120, while the sum is 19.

The square root of 131121541 is about 11450.8314545277. The cubic root of 131121541 is about 508.0323271324.

Adding to 131121541 its reverse (145121131), we get a palindrome (276242672).

The spelling of 131121541 in words is "one hundred thirty-one million, one hundred twenty-one thousand, five hundred forty-one".