121383945 has 48 divisors (see below), whose sum is σ = 216216000. Its totient is φ = 62974080.

The previous prime is 121383929. The next prime is 121383953. The reversal of 121383945 is 549383121.

It is not a de Polignac number, because 121383945 - 2⁴ = 121383929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 347631 + ... + 347979.

It is an arithmetic number, because the mean of its divisors is an integer number (4504500).

Almost surely, 2^121383945 is an apocalyptic number.

121383945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121383945 is a deficient number, since it is larger than the sum of its proper divisors (94832055).

121383945 is a wasteful number, since it uses less digits than its factorization.

121383945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 547 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 121383945 is about 11017.4382231079. The cubic root of 121383945 is about 495.1313394979.

It can be divided in two parts, 1213 and 83945, that added together give a palindrome (85158).

The spelling of 121383945 in words is "one hundred twenty-one million, three hundred eighty-three thousand, nine hundred forty-five".