1081562501 has 2 divisors, whose sum is σ = 1081562502. Its totient is φ = 1081562500.

The previous prime is 1081562497. The next prime is 1081562507. The reversal of 1081562501 is 1052651801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 976500001 + 105062500 = 31249^2 + 10250^2 .

It is an emirp because it is prime and its reverse (1052651801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1081562501 - 2² = 1081562497 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081562507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540781250 + 540781251.

It is an arithmetic number, because the mean of its divisors is an integer number (540781251).

Almost surely, 2^1081562501 is an apocalyptic number.

It is an amenable number.

1081562501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081562501 is an equidigital number, since it uses as much as digits as its factorization.

1081562501 is an evil number, because the sum of its binary digits is even.

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

The square root of 1081562501 is about 32887.1175538386. The cubic root of 1081562501 is about 1026.4801146093.

The spelling of 1081562501 in words is "one billion, eighty-one million, five hundred sixty-two thousand, five hundred one".