1229770855 has 4 divisors (see below), whose sum is σ = 1475725032. Its totient is φ = 983816680.

The previous prime is 1229770823. The next prime is 1229770859. The reversal of 1229770855 is 5580779221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5580779221 = 6359 ⋅877619.

It is not a de Polignac number, because 1229770855 - 2⁵ = 1229770823 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 (1229770859) 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, 122977081 + ... + 122977090.

It is an arithmetic number, because the mean of its divisors is an integer number (368931258).

Almost surely, 2^1229770855 is an apocalyptic number.

1229770855 is a deficient number, since it is larger than the sum of its proper divisors (245954177).

1229770855 is an equidigital number, since it uses as much as digits as its factorization.

1229770855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245954176.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 1229770855 is about 35068.0888415665. The cubic root of 1229770855 is about 1071.3747302172.

The spelling of 1229770855 in words is "one billion, two hundred twenty-nine million, seven hundred seventy thousand, eight hundred fifty-five".