145662681 has 16 divisors (see below), whose sum is σ = 209131200. Its totient is φ = 89845248.

The previous prime is 145662653. The next prime is 145662689. The reversal of 145662681 is 186266541.

It is a happy number.

145662681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145662681 - 2⁶ = 145662617 is a prime.

It is a super-2 number, since 2×145662681² = 42435233272215522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145662689) 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, 21196 + ... + 27213.

It is an arithmetic number, because the mean of its divisors is an integer number (13070700).

Almost surely, 2^145662681 is an apocalyptic number.

It is an amenable number.

145662681 is a deficient number, since it is larger than the sum of its proper divisors (63468519).

145662681 is a wasteful number, since it uses less digits than its factorization.

145662681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48488.

The product of its digits is 69120, while the sum is 39.

The square root of 145662681 is about 12069.0795423678. The cubic root of 145662681 is about 526.1579050950.

The spelling of 145662681 in words is "one hundred forty-five million, six hundred sixty-two thousand, six hundred eighty-one".