1249726090 has 16 divisors (see below), whose sum is σ = 2262077280. Its totient is φ = 497097040.

The previous prime is 1249726069. The next prime is 1249726109. The reversal of 1249726090 is 906279421.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347296 + ... + 350875.

It is an arithmetic number, because the mean of its divisors is an integer number (141379830).

Almost surely, 2^1249726090 is an apocalyptic number.

1249726090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1249726090 is a deficient number, since it is larger than the sum of its proper divisors (1012351190).

1249726090 is a wasteful number, since it uses less digits than its factorization.

1249726090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698357.

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

The square root of 1249726090 is about 35351.4651747279. The cubic root of 1249726090 is about 1077.1386564406.

The spelling of 1249726090 in words is "one billion, two hundred forty-nine million, seven hundred twenty-six thousand, ninety".