121514545 has 4 divisors (see below), whose sum is σ = 145817460. Its totient is φ = 97211632.

The previous prime is 121514527. The next prime is 121514567. The reversal of 121514545 is 545415121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545415121 = 19 ⋅28706059.

It can be written as a sum of positive squares in 2 ways, for example, as 66650896 + 54863649 = 8164^2 + 7407^2 .

It is a cyclic number.

It is not a de Polignac number, because 121514545 - 2¹¹ = 121512497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12151450 + ... + 12151459.

It is an arithmetic number, because the mean of its divisors is an integer number (36454365).

Almost surely, 2^121514545 is an apocalyptic number.

It is an amenable number.

121514545 is a deficient number, since it is larger than the sum of its proper divisors (24302915).

121514545 is an equidigital number, since it uses as much as digits as its factorization.

121514545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24302914.

The product of its digits is 4000, while the sum is 28.

The square root of 121514545 is about 11023.3635973781. The cubic root of 121514545 is about 495.3088505505.

Adding to 121514545 its reverse (545415121), we get a palindrome (666929666).

The spelling of 121514545 in words is "one hundred twenty-one million, five hundred fourteen thousand, five hundred forty-five".