1025126101 has 4 divisors (see below), whose sum is σ = 1025191372. Its totient is φ = 1025060832.

The previous prime is 1025126087. The next prime is 1025126147. The reversal of 1025126101 is 1016215201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1016215201 = 103 ⋅9866167.

It can be written as a sum of positive squares in 2 ways, for example, as 883635076 + 141491025 = 29726^2 + 11895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025126101 - 2²³ = 1016737493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025126701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6841 + ... + 45793.

It is an arithmetic number, because the mean of its divisors is an integer number (256297843).

Almost surely, 2^1025126101 is an apocalyptic number.

It is an amenable number.

1025126101 is a deficient number, since it is larger than the sum of its proper divisors (65271).

1025126101 is an equidigital number, since it uses as much as digits as its factorization.

1025126101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65270.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1025126101 is about 32017.5904933522. The cubic root of 1025126101 is about 1008.3061832971.

The spelling of 1025126101 in words is "one billion, twenty-five million, one hundred twenty-six thousand, one hundred one".