1253123550 has 216 divisors, whose sum is σ = 4148011296. Its totient is φ = 269498880.

The previous prime is 1253123483. The next prime is 1253123569. The reversal of 1253123550 is 553213521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 373179 + ... + 376521.

It is an arithmetic number, because the mean of its divisors is an integer number (19203756).

Almost surely, 2^1253123550 is an apocalyptic number.

1253123550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1253123550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074005648).

1253123550 is an abundant number, since it is smaller than the sum of its proper divisors (2894887746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1253123550 is a wasteful number, since it uses less digits than its factorization.

1253123550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392 (or 3377 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1253123550 is about 35399.4851657478. The cubic root of 1253123550 is about 1078.1138632750.

The spelling of 1253123550 in words is "one billion, two hundred fifty-three million, one hundred twenty-three thousand, five hundred fifty".