1081645141 has 2 divisors, whose sum is σ = 1081645142. Its totient is φ = 1081645140.

The previous prime is 1081645109. The next prime is 1081645181. The reversal of 1081645141 is 1415461801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543869041 + 537776100 = 23321^2 + 23190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081645141 - 2⁵ = 1081645109 is a prime.

It is a super-2 number, since 2×1081645141² = 2339912422097819762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081645181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540822570 + 540822571.

It is an arithmetic number, because the mean of its divisors is an integer number (540822571).

Almost surely, 2^1081645141 is an apocalyptic number.

It is an amenable number.

1081645141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081645141 is an equidigital number, since it uses as much as digits as its factorization.

1081645141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 1081645141 is about 32888.3739488592. The cubic root of 1081645141 is about 1026.5062576990.

The spelling of 1081645141 in words is "one billion, eighty-one million, six hundred forty-five thousand, one hundred forty-one".