1249509448 has 32 divisors (see below), whose sum is σ = 2584548000. Its totient is φ = 561573760.

The previous prime is 1249509419. The next prime is 1249509449. The reversal of 1249509448 is 8449059421.

It is a super-2 number, since 2×1249509448² = 3122547721282529408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1249509398 and 1249509407.

It is not an unprimeable number, because it can be changed into a prime (1249509449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71938 + ... + 87601.

It is an arithmetic number, because the mean of its divisors is an integer number (80767125).

Almost surely, 2^1249509448 is an apocalyptic number.

It is an amenable number.

1249509448 is an abundant number, since it is smaller than the sum of its proper divisors (1335038552).

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

1249509448 is a wasteful number, since it uses less digits than its factorization.

1249509448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159645 (or 159641 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 1249509448 is about 35348.4009256430. The cubic root of 1249509448 is about 1077.0764116121.

The spelling of 1249509448 in words is "one billion, two hundred forty-nine million, five hundred nine thousand, four hundred forty-eight".