161426131 has 2 divisors, whose sum is σ = 161426132. Its totient is φ = 161426130.

The previous prime is 161426129. The next prime is 161426137. The reversal of 161426131 is 131624161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161426131 - 2¹ = 161426129 is a prime.

It is a super-2 number, since 2×161426131² = 52116791539258322, which contains 22 as substring.

Together with 161426129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 161426096 and 161426105.

It is not a weakly prime, because it can be changed into another prime (161426137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80713065 + 80713066.

It is an arithmetic number, because the mean of its divisors is an integer number (80713066).

Almost surely, 2^161426131 is an apocalyptic number.

161426131 is a deficient number, since it is larger than the sum of its proper divisors (1).

161426131 is an equidigital number, since it uses as much as digits as its factorization.

161426131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 161426131 is about 12705.3583577953. The cubic root of 161426131 is about 544.4917192494.

The spelling of 161426131 in words is "one hundred sixty-one million, four hundred twenty-six thousand, one hundred thirty-one".