1445115757 has 2 divisors, whose sum is σ = 1445115758. Its totient is φ = 1445115756.

The previous prime is 1445115751. The next prime is 1445115839. The reversal of 1445115757 is 7575115441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1081488996 + 363626761 = 32886^2 + 19069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1445115757 is a prime.

It is a super-2 number, since 2×1445115757² = 4176719102259366098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1445115751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722557878 + 722557879.

It is an arithmetic number, because the mean of its divisors is an integer number (722557879).

Almost surely, 2^1445115757 is an apocalyptic number.

It is an amenable number.

1445115757 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445115757 is an equidigital number, since it uses as much as digits as its factorization.

1445115757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98000, while the sum is 40.

The square root of 1445115757 is about 38014.6781783037. The cubic root of 1445115757 is about 1130.5789074327.

The spelling of 1445115757 in words is "one billion, four hundred forty-five million, one hundred fifteen thousand, seven hundred fifty-seven".