1209375055 has 16 divisors (see below), whose sum is σ = 1679569920. Its totient is φ = 818786592.

The previous prime is 1209374981. The next prime is 1209375059. The reversal of 1209375055 is 5505739021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1209375055 - 2⁷ = 1209374927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209375059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215929 + ... + 221458.

It is an arithmetic number, because the mean of its divisors is an integer number (104973120).

Almost surely, 2^1209375055 is an apocalyptic number.

1209375055 is a deficient number, since it is larger than the sum of its proper divisors (470194865).

1209375055 is an equidigital number, since it uses as much as digits as its factorization.

1209375055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437478.

The product of its (nonzero) digits is 47250, while the sum is 37.

The square root of 1209375055 is about 34776.0701488826. The cubic root of 1209375055 is about 1065.4187498597.

The spelling of 1209375055 in words is "one billion, two hundred nine million, three hundred seventy-five thousand, fifty-five".