1253055540 has 48 divisors (see below), whose sum is σ = 3827517120. Its totient is φ = 303770880.

The previous prime is 1253055539. The next prime is 1253055541. The reversal of 1253055540 is 455503521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1253055539) and next prime (1253055541).

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

It is a junction number, because it is equal to n+sod(n) for n = 1253055498 and 1253055507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253055541) 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, 948625 + ... + 949944.

It is an arithmetic number, because the mean of its divisors is an integer number (79739940).

Almost surely, 2^1253055540 is an apocalyptic number.

1253055540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253055540 is an abundant number, since it is smaller than the sum of its proper divisors (2574461580).

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

1253055540 is a wasteful number, since it uses less digits than its factorization.

1253055540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898592 (or 1898590 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 1253055540 is about 35398.5245455231. The cubic root of 1253055540 is about 1078.0943589863.

The spelling of 1253055540 in words is "one billion, two hundred fifty-three million, fifty-five thousand, five hundred forty".