122621287 has 2 divisors, whose sum is σ = 122621288. Its totient is φ = 122621286.

The previous prime is 122621249. The next prime is 122621297. The reversal of 122621287 is 782126221.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (782126221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122621287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122621227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61310643 + 61310644.

It is an arithmetic number, because the mean of its divisors is an integer number (61310644).

Almost surely, 2^122621287 is an apocalyptic number.

122621287 is a deficient number, since it is larger than the sum of its proper divisors (1).

122621287 is an equidigital number, since it uses as much as digits as its factorization.

122621287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 122621287 is about 11073.4496431780. The cubic root of 122621287 is about 496.8080489251.

The spelling of 122621287 in words is "one hundred twenty-two million, six hundred twenty-one thousand, two hundred eighty-seven".