122265840 has 40 divisors (see below), whose sum is σ = 379024848. Its totient is φ = 32604160.

The previous prime is 122265833. The next prime is 122265863. The reversal of 122265840 is 48562221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 122265798 and 122265807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254481 + ... + 254960.

Almost surely, 2^122265840 is an apocalyptic number.

122265840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122265840 is an abundant number, since it is smaller than the sum of its proper divisors (256759008).

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

122265840 is a wasteful number, since it uses less digits than its factorization.

122265840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509457 (or 509451 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 122265840 is about 11057.3884801069. The cubic root of 122265840 is about 496.3275455298.

The spelling of 122265840 in words is "one hundred twenty-two million, two hundred sixty-five thousand, eight hundred forty".