1204415155 has 4 divisors (see below), whose sum is σ = 1445298192. Its totient is φ = 963532120.

The previous prime is 1204415143. The next prime is 1204415161. The reversal of 1204415155 is 5515144021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5515144021 = 4493 ⋅1227497.

It is not a de Polignac number, because 1204415155 - 2⁹ = 1204414643 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120441511 + ... + 120441520.

It is an arithmetic number, because the mean of its divisors is an integer number (361324548).

Almost surely, 2^1204415155 is an apocalyptic number.

1204415155 is a deficient number, since it is larger than the sum of its proper divisors (240883037).

1204415155 is an equidigital number, since it uses as much as digits as its factorization.

1204415155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240883036.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 1204415155 is about 34704.6849142879. The cubic root of 1204415155 is about 1063.9602524748.

Adding to 1204415155 its reverse (5515144021), we get a palindrome (6719559176).

The spelling of 1204415155 in words is "one billion, two hundred four million, four hundred fifteen thousand, one hundred fifty-five".