1252747998 has 64 divisors (see below), whose sum is σ = 2899722240. Its totient is φ = 400528800.

The previous prime is 1252747997. The next prime is 1252747999. The reversal of 1252747998 is 8997472521.

It is an interprime number because it is at equal distance from previous prime (1252747997) and next prime (1252747999).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252747997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137443 + ... + 146273.

It is an arithmetic number, because the mean of its divisors is an integer number (45308160).

Almost surely, 2^1252747998 is an apocalyptic number.

1252747998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1252747998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1449861120).

1252747998 is an abundant number, since it is smaller than the sum of its proper divisors (1646974242).

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

1252747998 is a wasteful number, since it uses less digits than its factorization.

1252747998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8950 (or 8944 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 1252747998 is about 35394.1802843349. The cubic root of 1252747998 is about 1078.0061515569.

The spelling of 1252747998 in words is "one billion, two hundred fifty-two million, seven hundred forty-seven thousand, nine hundred ninety-eight".