1250042890 has 8 divisors (see below), whose sum is σ = 2250077220. Its totient is φ = 500017152.

The previous prime is 1250042881. The next prime is 1250042897. The reversal of 1250042890 is 982400521.

It can be written as a sum of positive squares in 2 ways, for example, as 1184254569 + 65788321 = 34413^2 + 8111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1250042897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62502135 + ... + 62502154.

Almost surely, 2^1250042890 is an apocalyptic number.

1250042890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1250042890 is a deficient number, since it is larger than the sum of its proper divisors (1000034330).

1250042890 is a wasteful number, since it uses less digits than its factorization.

1250042890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125004296.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1250042890 is about 35355.9456103213. The cubic root of 1250042890 is about 1077.2296653689.

The spelling of 1250042890 in words is "one billion, two hundred fifty million, forty-two thousand, eight hundred ninety".