122509253 has 4 divisors (see below), whose sum is σ = 126733740. Its totient is φ = 118284768.

The previous prime is 122509223. The next prime is 122509267. The reversal of 122509253 is 352905221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352905221 = 19 ⋅18573959.

It can be written as a sum of positive squares in 2 ways, for example, as 69772609 + 52736644 = 8353^2 + 7262^2 .

It is a cyclic number.

It is not a de Polignac number, because 122509253 - 2¹⁰ = 122508229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 4224457 = 122509253 / (1 + 2 + 2 + 5 + 0 + 9 + 2 + 5 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122509223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2112200 + ... + 2112257.

It is an arithmetic number, because the mean of its divisors is an integer number (31683435).

Almost surely, 2^122509253 is an apocalyptic number.

It is an amenable number.

122509253 is a deficient number, since it is larger than the sum of its proper divisors (4224487).

122509253 is an equidigital number, since it uses as much as digits as its factorization.

122509253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224486.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 122509253 is about 11068.3898106274. The cubic root of 122509253 is about 496.6566984972.

The spelling of 122509253 in words is "one hundred twenty-two million, five hundred nine thousand, two hundred fifty-three".