145645131 has 16 divisors (see below), whose sum is σ = 204652800. Its totient is φ = 91951200.

The previous prime is 145645063. The next prime is 145645133. The reversal of 145645131 is 131546541.

It is a happy number.

It is not a de Polignac number, because 145645131 - 2⁹ = 145644619 is a prime.

It is a super-2 number, since 2×145645131² = 42425008368014322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145645133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3481 + ... + 17418.

It is an arithmetic number, because the mean of its divisors is an integer number (12790800).

Almost surely, 2^145645131 is an apocalyptic number.

145645131 is a deficient number, since it is larger than the sum of its proper divisors (59007669).

145645131 is a wasteful number, since it uses less digits than its factorization.

145645131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21026.

The product of its digits is 7200, while the sum is 30.

The square root of 145645131 is about 12068.3524559071. The cubic root of 145645131 is about 526.1367730703.

The spelling of 145645131 in words is "one hundred forty-five million, six hundred forty-five thousand, one hundred thirty-one".