121283287 has 4 divisors (see below), whose sum is σ = 128417616. Its totient is φ = 114148960.

The previous prime is 121283269. The next prime is 121283297. The reversal of 121283287 is 782382121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121283287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121283297) 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, 3567139 + ... + 3567172.

It is an arithmetic number, because the mean of its divisors is an integer number (32104404).

Almost surely, 2^121283287 is an apocalyptic number.

121283287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121283287 is a deficient number, since it is larger than the sum of its proper divisors (7134329).

121283287 is an equidigital number, since it uses as much as digits as its factorization.

121283287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7134328.

The product of its digits is 10752, while the sum is 34.

The square root of 121283287 is about 11012.8691538581. The cubic root of 121283287 is about 494.9944386002.

The spelling of 121283287 in words is "one hundred twenty-one million, two hundred eighty-three thousand, two hundred eighty-seven".