122487819 has 8 divisors (see below), whose sum is σ = 164762832. Its totient is φ = 80935680.

The previous prime is 122487809. The next prime is 122487853. The reversal of 122487819 is 918784221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122487819 - 2⁴ = 122487803 is a prime.

It is a super-2 number, since 2×122487819² = 30006531606753522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122487809) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 180322 + ... + 180999.

It is an arithmetic number, because the mean of its divisors is an integer number (20595354).

Almost surely, 2^122487819 is an apocalyptic number.

122487819 is a deficient number, since it is larger than the sum of its proper divisors (42275013).

122487819 is a wasteful number, since it uses less digits than its factorization.

122487819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361437.

The product of its digits is 64512, while the sum is 42.

The square root of 122487819 is about 11067.4215154208. The cubic root of 122487819 is about 496.6277320850.

The spelling of 122487819 in words is "one hundred twenty-two million, four hundred eighty-seven thousand, eight hundred nineteen".