1001243690 has 8 divisors (see below), whose sum is σ = 1802238660. Its totient is φ = 400497472.

The previous prime is 1001243689. The next prime is 1001243699. The reversal of 1001243690 is 963421001.

It can be written as a sum of positive squares in 2 ways, for example, as 973502401 + 27741289 = 31201^2 + 5267^2 .

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

It is a super-2 number, since 2×1001243690² = 2004977853529632200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1001243699) 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, 50062175 + ... + 50062194.

Almost surely, 2^1001243690 is an apocalyptic number.

1001243690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001243690 is a deficient number, since it is larger than the sum of its proper divisors (800994970).

1001243690 is a wasteful number, since it uses less digits than its factorization.

1001243690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100124376.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1001243690 is about 31642.4349568740. The cubic root of 1001243690 is about 1000.4143915892.

Adding to 1001243690 its reverse (963421001), we get a palindrome (1964664691).

The spelling of 1001243690 in words is "one billion, one million, two hundred forty-three thousand, six hundred ninety".