1285741741 has 2 divisors, whose sum is σ = 1285741742. Its totient is φ = 1285741740.

The previous prime is 1285741661. The next prime is 1285741763. The reversal of 1285741741 is 1471475821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1141020841 + 144720900 = 33779^2 + 12030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285741741 is a prime.

It is a super-2 number, since 2×1285741741² = 3306263649099422162, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1285741694 and 1285741703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285741781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642870870 + 642870871.

It is an arithmetic number, because the mean of its divisors is an integer number (642870871).

Almost surely, 2^1285741741 is an apocalyptic number.

It is an amenable number.

1285741741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285741741 is an equidigital number, since it uses as much as digits as its factorization.

1285741741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62720, while the sum is 40.

The square root of 1285741741 is about 35857.2411236559. The cubic root of 1285741741 is about 1087.3881129616.

The spelling of 1285741741 in words is "one billion, two hundred eighty-five million, seven hundred forty-one thousand, seven hundred forty-one".