1201258739 has 2 divisors, whose sum is σ = 1201258740. Its totient is φ = 1201258738.

The previous prime is 1201258657. The next prime is 1201258741. The reversal of 1201258739 is 9378521021.

It is a strong prime.

It is an emirp because it is prime and its reverse (9378521021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201258739 - 2¹² = 1201254643 is a prime.

Together with 1201258741, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1201258769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600629369 + 600629370.

It is an arithmetic number, because the mean of its divisors is an integer number (600629370).

Almost surely, 2^1201258739 is an apocalyptic number.

1201258739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201258739 is an equidigital number, since it uses as much as digits as its factorization.

1201258739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1201258739 is about 34659.1797219726. The cubic root of 1201258739 is about 1063.0299976166.

The spelling of 1201258739 in words is "one billion, two hundred one million, two hundred fifty-eight thousand, seven hundred thirty-nine".