146405131 has 2 divisors, whose sum is σ = 146405132. Its totient is φ = 146405130.

The previous prime is 146405113. The next prime is 146405159. The reversal of 146405131 is 131504641.

Together with previous prime (146405113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (131504641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 146405131 - 2⁵ = 146405099 is a prime.

It is a super-2 number, since 2×146405131² = 42868924766254322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 146405096 and 146405105.

It is not a weakly prime, because it can be changed into another prime (146405191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73202565 + 73202566.

It is an arithmetic number, because the mean of its divisors is an integer number (73202566).

Almost surely, 2^146405131 is an apocalyptic number.

146405131 is a deficient number, since it is larger than the sum of its proper divisors (1).

146405131 is an equidigital number, since it uses as much as digits as its factorization.

146405131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 146405131 is about 12099.7987999801. The cubic root of 146405131 is about 527.0503416318.

Adding to 146405131 its reverse (131504641), we get a palindrome (277909772).

It can be divided in two parts, 146 and 405131, that multiplied together give a triangular number (59149126 = T₁₀₈₇₆).

The spelling of 146405131 in words is "one hundred forty-six million, four hundred five thousand, one hundred thirty-one".