121740887 has 4 divisors (see below), whose sum is σ = 121938816. Its totient is φ = 121542960.

The previous prime is 121740877. The next prime is 121740911. The reversal of 121740887 is 788047121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121740887 - 2⁶ = 121740823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121740887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121740877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98039 + ... + 99272.

It is an arithmetic number, because the mean of its divisors is an integer number (30484704).

Almost surely, 2^121740887 is an apocalyptic number.

121740887 is a deficient number, since it is larger than the sum of its proper divisors (197929).

121740887 is an equidigital number, since it uses as much as digits as its factorization.

121740887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197928.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 121740887 is about 11033.6252881816. The cubic root of 121740887 is about 495.6161927981.

The spelling of 121740887 in words is "one hundred twenty-one million, seven hundred forty thousand, eight hundred eighty-seven".