121440545 has 8 divisors (see below), whose sum is σ = 150753960. Its totient is φ = 93802240.

The previous prime is 121440541. The next prime is 121440551. The reversal of 121440545 is 545044121.

It can be written as a sum of positive squares in 4 ways, for example, as 36192256 + 85248289 = 6016^2 + 9233^2 .

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

It is not a de Polignac number, because 121440545 - 2² = 121440541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121440541) 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, 418616 + ... + 418905.

It is an arithmetic number, because the mean of its divisors is an integer number (18844245).

Almost surely, 2^121440545 is an apocalyptic number.

It is an amenable number.

121440545 is a deficient number, since it is larger than the sum of its proper divisors (29313415).

121440545 is an equidigital number, since it uses as much as digits as its factorization.

121440545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837555.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 121440545 is about 11020.0065789454. The cubic root of 121440545 is about 495.2082856407.

Adding to 121440545 its reverse (545044121), we get a palindrome (666484666).

The spelling of 121440545 in words is "one hundred twenty-one million, four hundred forty thousand, five hundred forty-five".