1249371904 has 108 divisors (see below), whose sum is σ = 2873639160. Its totient is φ = 537569280.

The previous prime is 1249371901. The next prime is 1249371913. The reversal of 1249371904 is 4091739421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249371901) 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, 1015962 + ... + 1017190.

It is an arithmetic number, because the mean of its divisors is an integer number (26607770).

Almost surely, 2^1249371904 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 1249371904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1436819580).

1249371904 is an abundant number, since it is smaller than the sum of its proper divisors (1624267256).

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

1249371904 is a wasteful number, since it uses less digits than its factorization.

1249371904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1249371904 is about 35346.4553244028. The cubic root of 1249371904 is about 1077.0368892128.

The spelling of 1249371904 in words is "one billion, two hundred forty-nine million, three hundred seventy-one thousand, nine hundred four".