1253855213 has 16 divisors (see below), whose sum is σ = 1431452736. Its totient is φ = 1088014080.

The previous prime is 1253855209. The next prime is 1253855261. The reversal of 1253855213 is 3125583521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1253855213 - 2² = 1253855209 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 (1253855203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211670 + ... + 217512.

It is an arithmetic number, because the mean of its divisors is an integer number (89465796).

Almost surely, 2^1253855213 is an apocalyptic number.

1253855213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1253855213 is a deficient number, since it is larger than the sum of its proper divisors (177597523).

1253855213 is a wasteful number, since it uses less digits than its factorization.

1253855213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6844.

The product of its digits is 36000, while the sum is 35.

The square root of 1253855213 is about 35409.8180311619. The cubic root of 1253855213 is about 1078.3236490675.

The spelling of 1253855213 in words is "one billion, two hundred fifty-three million, eight hundred fifty-five thousand, two hundred thirteen".