161225039 has 2 divisors, whose sum is σ = 161225040. Its totient is φ = 161225038.

The previous prime is 161224951. The next prime is 161225107. The reversal of 161225039 is 930522161.

161225039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (930522161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161225039 - 2⁸ = 161224783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161227039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80612519 + 80612520.

It is an arithmetic number, because the mean of its divisors is an integer number (80612520).

Almost surely, 2^161225039 is an apocalyptic number.

161225039 is a deficient number, since it is larger than the sum of its proper divisors (1).

161225039 is an equidigital number, since it uses as much as digits as its factorization.

161225039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 161225039 is about 12697.4422227471. The cubic root of 161225039 is about 544.2655302891.

The spelling of 161225039 in words is "one hundred sixty-one million, two hundred twenty-five thousand, thirty-nine".