1245916541 has 2 divisors, whose sum is σ = 1245916542. Its totient is φ = 1245916540.

The previous prime is 1245916517. The next prime is 1245916547. The reversal of 1245916541 is 1456195421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 705168025 + 540748516 = 26555^2 + 23254^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245916541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1245916495 and 1245916504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245916547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622958270 + 622958271.

It is an arithmetic number, because the mean of its divisors is an integer number (622958271).

Almost surely, 2^1245916541 is an apocalyptic number.

It is an amenable number.

1245916541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245916541 is an equidigital number, since it uses as much as digits as its factorization.

1245916541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 38.

The square root of 1245916541 is about 35297.5429881458. The cubic root of 1245916541 is about 1076.0430592835.

The spelling of 1245916541 in words is "one billion, two hundred forty-five million, nine hundred sixteen thousand, five hundred forty-one".