122542451 has 4 divisors (see below), whose sum is σ = 122769504. Its totient is φ = 122315400.

The previous prime is 122542423. The next prime is 122542463. The reversal of 122542451 is 154245221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154245221 = 13 ⋅11865017.

It is a cyclic number.

It is not a de Polignac number, because 122542451 - 2¹⁸ = 122280307 is a prime.

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 122542451.

It is not an unprimeable number, because it can be changed into a prime (122542421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112715 + ... + 113796.

It is an arithmetic number, because the mean of its divisors is an integer number (30692376).

Almost surely, 2^122542451 is an apocalyptic number.

122542451 is a deficient number, since it is larger than the sum of its proper divisors (227053).

122542451 is an equidigital number, since it uses as much as digits as its factorization.

122542451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227052.

The product of its digits is 3200, while the sum is 26.

The square root of 122542451 is about 11069.8893851745. The cubic root of 122542451 is about 496.7015563877.

Adding to 122542451 its reverse (154245221), we get a palindrome (276787672).

The spelling of 122542451 in words is "one hundred twenty-two million, five hundred forty-two thousand, four hundred fifty-one".