121761007 has 4 divisors (see below), whose sum is σ = 123429040. Its totient is φ = 120092976.

The previous prime is 121760999. The next prime is 121761019. The reversal of 121761007 is 700167121.

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 121761007 - 2³ = 121760999 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121761047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833907 + ... + 834052.

It is an arithmetic number, because the mean of its divisors is an integer number (30857260).

Almost surely, 2^121761007 is an apocalyptic number.

121761007 is a deficient number, since it is larger than the sum of its proper divisors (1668033).

121761007 is an equidigital number, since it uses as much as digits as its factorization.

121761007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668032.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 121761007 is about 11034.5370088645. The cubic root of 121761007 is about 495.6434946323.

The spelling of 121761007 in words is "one hundred twenty-one million, seven hundred sixty-one thousand, seven".