122610640 has 20 divisors (see below), whose sum is σ = 285069924. Its totient is φ = 49044224.

The previous prime is 122610601. The next prime is 122610643. The reversal of 122610640 is 46016221.

It can be written as a sum of positive squares in 2 ways, for example, as 84566416 + 38044224 = 9196^2 + 6168^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122610643) 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, 766237 + ... + 766396.

Almost surely, 2^122610640 is an apocalyptic number.

122610640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122610640 is an abundant number, since it is smaller than the sum of its proper divisors (162459284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122610640 is a wasteful number, since it uses less digits than its factorization.

122610640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532646 (or 1532640 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 122610640 is about 11072.9688882431. The cubic root of 122610640 is about 496.7936695067.

Adding to 122610640 its reverse (46016221), we get a palindrome (168626861).

The spelling of 122610640 in words is "one hundred twenty-two million, six hundred ten thousand, six hundred forty".