1205422153 has 4 divisors (see below), whose sum is σ = 1298146948. Its totient is φ = 1112697360.

The previous prime is 1205422147. The next prime is 1205422177. The reversal of 1205422153 is 3512245021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3512245021 = 211 ⋅16645711.

It can be written as a sum of positive squares in 2 ways, for example, as 103978809 + 1101443344 = 10197^2 + 33188^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205422153 - 2⁵ = 1205422121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205422103) 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, 46362378 + ... + 46362403.

It is an arithmetic number, because the mean of its divisors is an integer number (324536737).

Almost surely, 2^1205422153 is an apocalyptic number.

1205422153 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1205422153 is a deficient number, since it is larger than the sum of its proper divisors (92724795).

1205422153 is an equidigital number, since it uses as much as digits as its factorization.

1205422153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92724794.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1205422153 is about 34719.1899819106. The cubic root of 1205422153 is about 1064.2566916175.

Adding to 1205422153 its reverse (3512245021), we get a palindrome (4717667174).

The spelling of 1205422153 in words is "one billion, two hundred five million, four hundred twenty-two thousand, one hundred fifty-three".