1253243550 has 96 divisors (see below), whose sum is σ = 3492776448. Its totient is φ = 295067520.

The previous prime is 1253243533. The next prime is 1253243617. The reversal of 1253243550 is 553423521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30879 + ... + 58821.

It is an arithmetic number, because the mean of its divisors is an integer number (36383088).

Almost surely, 2^1253243550 is an apocalyptic number.

1253243550 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 1253243550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1746388224).

1253243550 is an abundant number, since it is smaller than the sum of its proper divisors (2239532898).

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

1253243550 is a wasteful number, since it uses less digits than its factorization.

1253243550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27994 (or 27989 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 1253243550 is about 35401.1800650769. The cubic root of 1253243550 is about 1078.1482758260.

The spelling of 1253243550 in words is "one billion, two hundred fifty-three million, two hundred forty-three thousand, five hundred fifty".