122047531 has 4 divisors (see below), whose sum is σ = 122125552. Its totient is φ = 121969512.

The previous prime is 122047489. The next prime is 122047537. The reversal of 122047531 is 135740221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122047531 - 2⁹ = 122047019 is a prime.

It is a super-2 number, since 2×122047531² = 29791199646391922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122047496 and 122047505.

It is not an unprimeable number, because it can be changed into a prime (122047537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36615 + ... + 39808.

It is an arithmetic number, because the mean of its divisors is an integer number (30531388).

Almost surely, 2^122047531 is an apocalyptic number.

122047531 is a deficient number, since it is larger than the sum of its proper divisors (78021).

122047531 is an equidigital number, since it uses as much as digits as its factorization.

122047531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78020.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 122047531 is about 11047.5124349330. The cubic root of 122047531 is about 496.0319674050.

Adding to 122047531 its reverse (135740221), we get a palindrome (257787752).

The spelling of 122047531 in words is "one hundred twenty-two million, forty-seven thousand, five hundred thirty-one".