122781622 has 4 divisors (see below), whose sum is σ = 184172436. Its totient is φ = 61390810.

The previous prime is 122781611. The next prime is 122781623. The reversal of 122781622 is 226187221.

It is a happy number.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122781623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30695404 + ... + 30695407.

It is an arithmetic number, because the mean of its divisors is an integer number (46043109).

Almost surely, 2^122781622 is an apocalyptic number.

122781622 is a deficient number, since it is larger than the sum of its proper divisors (61390814).

122781622 is an equidigital number, since it uses as much as digits as its factorization.

122781622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61390813.

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

The square root of 122781622 is about 11080.6868920659. The cubic root of 122781622 is about 497.0244904784.

The spelling of 122781622 in words is "one hundred twenty-two million, seven hundred eighty-one thousand, six hundred twenty-two".