1243662061 has 8 divisors (see below), whose sum is σ = 1315093248. Its totient is φ = 1174188000.

The previous prime is 1243662053. The next prime is 1243662109. The reversal of 1243662061 is 1602663421.

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

It is a cyclic number.

It is not a de Polignac number, because 1243662061 - 2³ = 1243662053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243662011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487975 + ... + 490516.

It is an arithmetic number, because the mean of its divisors is an integer number (164386656).

Almost surely, 2^1243662061 is an apocalyptic number.

It is an amenable number.

1243662061 is a deficient number, since it is larger than the sum of its proper divisors (71431187).

1243662061 is an equidigital number, since it uses as much as digits as its factorization.

1243662061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978563.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1243662061 is about 35265.5931610401. The cubic root of 1243662061 is about 1075.3936358328.

The spelling of 1243662061 in words is "one billion, two hundred forty-three million, six hundred sixty-two thousand, sixty-one".