101025139 has 2 divisors, whose sum is σ = 101025140. Its totient is φ = 101025138.

The previous prime is 101025091. The next prime is 101025161. The reversal of 101025139 is 931520101.

It is an a-pointer prime, because the next prime (101025161) can be obtained adding 101025139 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101025139 - 2⁷ = 101025011 is a prime.

It is not a weakly prime, because it can be changed into another prime (101025179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50512569 + 50512570.

It is an arithmetic number, because the mean of its divisors is an integer number (50512570).

Almost surely, 2^101025139 is an apocalyptic number.

101025139 is a deficient number, since it is larger than the sum of its proper divisors (1).

101025139 is an equidigital number, since it uses as much as digits as its factorization.

101025139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 101025139 is about 10051.1262553009. The cubic root of 101025139 is about 465.7395853844.

The spelling of 101025139 in words is "one hundred one million, twenty-five thousand, one hundred thirty-nine".