122439825 has 18 divisors (see below), whose sum is σ = 219303734. Its totient is φ = 65301120.

The previous prime is 122439799. The next prime is 122439847. The reversal of 122439825 is 528934221.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 21316689 + 101123136 = 4617^2 + 10056^2 .

It is not a de Polignac number, because 122439825 - 2¹⁹ = 121915537 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122439825.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 271864 + ... + 272313.

Almost surely, 2^122439825 is an apocalyptic number.

122439825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122439825 is a deficient number, since it is larger than the sum of its proper divisors (96863909).

122439825 is a wasteful number, since it uses less digits than its factorization.

122439825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544193 (or 544185 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 122439825 is about 11065.2530472647. The cubic root of 122439825 is about 496.5628596067.

The spelling of 122439825 in words is "one hundred twenty-two million, four hundred thirty-nine thousand, eight hundred twenty-five".