121402545 has 64 divisors (see below), whose sum is σ = 220796928. Its totient is φ = 56448000.

The previous prime is 121402543. The next prime is 121402573. The reversal of 121402545 is 545204121.

It is not a de Polignac number, because 121402545 - 2¹ = 121402543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121402543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 503625 + ... + 503865.

It is an arithmetic number, because the mean of its divisors is an integer number (3449952).

Almost surely, 2^121402545 is an apocalyptic number.

121402545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121402545 is a deficient number, since it is larger than the sum of its proper divisors (99394383).

121402545 is a wasteful number, since it uses less digits than its factorization.

121402545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 121402545 is about 11018.2823071475. The cubic root of 121402545 is about 495.1566283243.

Adding to 121402545 its reverse (545204121), we get a palindrome (666606666).

The spelling of 121402545 in words is "one hundred twenty-one million, four hundred two thousand, five hundred forty-five".