1242715707455 has 4 divisors (see below), whose sum is σ = 1491258848952. Its totient is φ = 994172565960.

The previous prime is 1242715707437. The next prime is 1242715707509. The reversal of 1242715707455 is 5547075172421.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1242715707455 - 2¹⁶ = 1242715641919 is a prime.

It is a super-2 number, since 2×1242715707455² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124271570741 + ... + 124271570750.

It is an arithmetic number, because the mean of its divisors is an integer number (372814712238).

Almost surely, 2^{1242715707455} is an apocalyptic number.

1242715707455 is a deficient number, since it is larger than the sum of its proper divisors (248543141497).

1242715707455 is an equidigital number, since it uses as much as digits as its factorization.

1242715707455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248543141496.

The product of its (nonzero) digits is 2744000, while the sum is 50.

The spelling of 1242715707455 in words is "one trillion, two hundred forty-two billion, seven hundred fifteen million, seven hundred seven thousand, four hundred fifty-five".