1249124388 has 48 divisors (see below), whose sum is σ = 3050199936. Its totient is φ = 397112320.

The previous prime is 1249124321. The next prime is 1249124399. The reversal of 1249124388 is 8834219421.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91018 + ... + 103838.

It is an arithmetic number, because the mean of its divisors is an integer number (63545832).

Almost surely, 2^1249124388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1249124388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1525099968).

1249124388 is an abundant number, since it is smaller than the sum of its proper divisors (1801075548).

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

1249124388 is a wasteful number, since it uses less digits than its factorization.

1249124388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13204 (or 13202 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 1249124388 is about 35342.9538663649. The cubic root of 1249124388 is about 1076.9657597468.

The spelling of 1249124388 in words is "one billion, two hundred forty-nine million, one hundred twenty-four thousand, three hundred eighty-eight".