1025115149 has 2 divisors, whose sum is σ = 1025115150. Its totient is φ = 1025115148.

The previous prime is 1025115137. The next prime is 1025115173. The reversal of 1025115149 is 9415115201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011558025 + 13557124 = 31805^2 + 3682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025115149 is a prime.

It is a super-2 number, since 2×1025115149² = 2101722137418584402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025115199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512557574 + 512557575.

It is an arithmetic number, because the mean of its divisors is an integer number (512557575).

Almost surely, 2^1025115149 is an apocalyptic number.

It is an amenable number.

1025115149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025115149 is an equidigital number, since it uses as much as digits as its factorization.

1025115149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 1025115149 is about 32017.4194619117. The cubic root of 1025115149 is about 1008.3025925165.

The spelling of 1025115149 in words is "one billion, twenty-five million, one hundred fifteen thousand, one hundred forty-nine".