121374287 has 4 divisors (see below), whose sum is σ = 123083856. Its totient is φ = 119664720.

The previous prime is 121374283. The next prime is 121374307. The reversal of 121374287 is 782473121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782473121 = 83 ⋅9427387.

It is a cyclic number.

It is not a de Polignac number, because 121374287 - 2² = 121374283 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 (121374283) 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, 854678 + ... + 854819.

It is an arithmetic number, because the mean of its divisors is an integer number (30770964).

Almost surely, 2^121374287 is an apocalyptic number.

121374287 is a deficient number, since it is larger than the sum of its proper divisors (1709569).

121374287 is an equidigital number, since it uses as much as digits as its factorization.

121374287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709568.

The product of its digits is 18816, while the sum is 35.

The square root of 121374287 is about 11016.9999092312. Note that the first 4 decimals coincide. The cubic root of 121374287 is about 495.1182073237.

The spelling of 121374287 in words is "one hundred twenty-one million, three hundred seventy-four thousand, two hundred eighty-seven".