1249097850 has 576 divisors, whose sum is σ = 4679700480. Its totient is φ = 230515200.

The previous prime is 1249097827. The next prime is 1249097879. The reversal of 1249097850 is 587909421.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1249097796 and 1249097805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 21171121 + ... + 21171179.

It is an arithmetic number, because the mean of its divisors is an integer number (8124480).

Almost surely, 2^1249097850 is an apocalyptic number.

1249097850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1249097850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2339850240).

1249097850 is an abundant number, since it is smaller than the sum of its proper divisors (3430602630).

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

1249097850 is a wasteful number, since it uses less digits than its factorization.

1249097850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1249097850 is about 35342.5784288583. The cubic root of 1249097850 is about 1076.9581328790.

The spelling of 1249097850 in words is "one billion, two hundred forty-nine million, ninety-seven thousand, eight hundred fifty".