121965387 has 16 divisors (see below), whose sum is σ = 168648480. Its totient is φ = 78310400.

The previous prime is 121965373. The next prime is 121965391. The reversal of 121965387 is 783569121.

It is a cyclic number.

It is not a de Polignac number, because 121965387 - 2⁸ = 121965131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121965317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38587 + ... + 41627.

It is an arithmetic number, because the mean of its divisors is an integer number (10540530).

Almost surely, 2^121965387 is an apocalyptic number.

121965387 is a deficient number, since it is larger than the sum of its proper divisors (46683093).

121965387 is a wasteful number, since it uses less digits than its factorization.

121965387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534.

The product of its digits is 90720, while the sum is 42.

The square root of 121965387 is about 11043.7940491481. The cubic root of 121965387 is about 495.9206577801.

The spelling of 121965387 in words is "one hundred twenty-one million, nine hundred sixty-five thousand, three hundred eighty-seven".