1541141561 has 2 divisors, whose sum is σ = 1541141562. Its totient is φ = 1541141560.

The previous prime is 1541141531. The next prime is 1541141587. The reversal of 1541141561 is 1651411451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1424609536 + 116532025 = 37744^2 + 10795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1541141561 is a prime.

It is a super-2 number, since 2×1541141561² = 4750234622083033442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1541141521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770570780 + 770570781.

It is an arithmetic number, because the mean of its divisors is an integer number (770570781).

Almost surely, 2^1541141561 is an apocalyptic number.

It is an amenable number.

1541141561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541141561 is an equidigital number, since it uses as much as digits as its factorization.

1541141561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 29.

The square root of 1541141561 is about 39257.3758802088. The cubic root of 1541141561 is about 1155.0856207337.

The spelling of 1541141561 in words is "one billion, five hundred forty-one million, one hundred forty-one thousand, five hundred sixty-one".