122420440 has 16 divisors (see below), whose sum is σ = 275446080. Its totient is φ = 48968160.

The previous prime is 122420437. The next prime is 122420443. The reversal of 122420440 is 44024221.

It is an interprime number because it is at equal distance from previous prime (122420437) and next prime (122420443).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122420443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530216 + ... + 1530295.

It is an arithmetic number, because the mean of its divisors is an integer number (17215380).

Almost surely, 2^122420440 is an apocalyptic number.

122420440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122420440 is an abundant number, since it is smaller than the sum of its proper divisors (153025640).

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

122420440 is a wasteful number, since it uses less digits than its factorization.

122420440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060522 (or 3060518 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 122420440 is about 11064.3770723887. The cubic root of 122420440 is about 496.5366525044.

Adding to 122420440 its reverse (44024221), we get a palindrome (166444661).

The spelling of 122420440 in words is "one hundred twenty-two million, four hundred twenty thousand, four hundred forty".