1243850061 has 4 divisors (see below), whose sum is σ = 1658466752. Its totient is φ = 829233372.

The previous prime is 1243850059. The next prime is 1243850077. The reversal of 1243850061 is 1600583421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1243850061 - 2¹ = 1243850059 is a prime.

It is a super-3 number, since 3×1243850061³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243850011) 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, 207308341 + ... + 207308346.

It is an arithmetic number, because the mean of its divisors is an integer number (414616688).

Almost surely, 2^1243850061 is an apocalyptic number.

It is an amenable number.

1243850061 is a deficient number, since it is larger than the sum of its proper divisors (414616691).

1243850061 is an equidigital number, since it uses as much as digits as its factorization.

1243850061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414616690.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1243850061 is about 35268.2585478784. The cubic root of 1243850061 is about 1075.4478209215.

The spelling of 1243850061 in words is "one billion, two hundred forty-three million, eight hundred fifty thousand, sixty-one".