122156543 has 12 divisors (see below), whose sum is σ = 130258872. Its totient is φ = 114533760.

The previous prime is 122156537. The next prime is 122156549. The reversal of 122156543 is 345651221.

It is an interprime number because it is at equal distance from previous prime (122156537) and next prime (122156549).

It is not a de Polignac number, because 122156543 - 2⁴ = 122156527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122156549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95021 + ... + 96297.

It is an arithmetic number, because the mean of its divisors is an integer number (10854906).

Almost surely, 2^122156543 is an apocalyptic number.

122156543 is a deficient number, since it is larger than the sum of its proper divisors (8102329).

122156543 is a wasteful number, since it uses less digits than its factorization.

122156543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642 (or 1625 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 122156543 is about 11052.4451140913. The cubic root of 122156543 is about 496.1796075499.

The spelling of 122156543 in words is "one hundred twenty-two million, one hundred fifty-six thousand, five hundred forty-three".