121426387 has 2 divisors, whose sum is σ = 121426388. Its totient is φ = 121426386.

The previous prime is 121426381. The next prime is 121426421. The reversal of 121426387 is 783624121.

It is an a-pointer prime, because the next prime (121426421) can be obtained adding 121426387 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121426387 is a prime.

It is not a weakly prime, because it can be changed into another prime (121426381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60713193 + 60713194.

It is an arithmetic number, because the mean of its divisors is an integer number (60713194).

Almost surely, 2^121426387 is an apocalyptic number.

121426387 is a deficient number, since it is larger than the sum of its proper divisors (1).

121426387 is an equidigital number, since it uses as much as digits as its factorization.

121426387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 121426387 is about 11019.3641831097. The cubic root of 121426387 is about 495.1890404718.

The spelling of 121426387 in words is "one hundred twenty-one million, four hundred twenty-six thousand, three hundred eighty-seven".