1285481101 has 2 divisors, whose sum is σ = 1285481102. Its totient is φ = 1285481100.

The previous prime is 1285481089. The next prime is 1285481111. The reversal of 1285481101 is 1011845821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 803722500 + 481758601 = 28350^2 + 21949^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285481101 - 2⁵ = 1285481069 is a prime.

It is a super-2 number, since 2×1285481101² = 3304923322056344402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285481111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642740550 + 642740551.

It is an arithmetic number, because the mean of its divisors is an integer number (642740551).

Almost surely, 2^1285481101 is an apocalyptic number.

It is an amenable number.

1285481101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285481101 is an equidigital number, since it uses as much as digits as its factorization.

1285481101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 31.

The square root of 1285481101 is about 35853.6065270985. The cubic root of 1285481101 is about 1087.3146311257.

The spelling of 1285481101 in words is "one billion, two hundred eighty-five million, four hundred eighty-one thousand, one hundred one".