1273189248 has 96 divisors (see below), whose sum is σ = 3674796840. Its totient is φ = 423115776.

The previous prime is 1273189243. The next prime is 1273189249. The reversal of 1273189248 is 8429813721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1273189248² = 3242021722445611008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273189241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 428215 + ... + 431177.

Almost surely, 2^1273189248 is an apocalyptic number.

1273189248 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1273189248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1837398420).

1273189248 is an abundant number, since it is smaller than the sum of its proper divisors (2401607592).

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

1273189248 is a wasteful number, since it uses less digits than its factorization.

1273189248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3356 (or 3341 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1273189248 is about 35681.7775341980. Note that the first 3 decimals coincide. The cubic root of 1273189248 is about 1083.8378683002.

The spelling of 1273189248 in words is "one billion, two hundred seventy-three million, one hundred eighty-nine thousand, two hundred forty-eight".