145923642 has 24 divisors (see below), whose sum is σ = 320501844. Its totient is φ = 47974464.

The previous prime is 145923637. The next prime is 145923647. The reversal of 145923642 is 246329541.

It is a happy number.

145923642 is a `hidden beast` number, since 1 + 4 + 5 + 9 + 2 + 3 + 642 = 666.

145923642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (145923637) and next prime (145923647).

It can be written as a sum of positive squares in 2 ways, for example, as 141348321 + 4575321 = 11889^2 + 2139^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145923597 and 145923606.

It is not an unprimeable number, because it can be changed into a prime (145923647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54213 + ... + 56840.

Almost surely, 2^145923642 is an apocalyptic number.

145923642 is an abundant number, since it is smaller than the sum of its proper divisors (174578202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145923642 is a wasteful number, since it uses less digits than its factorization.

145923642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111134 (or 111131 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 145923642 is about 12079.8858438315. The cubic root of 145923642 is about 526.4719291966.

The spelling of 145923642 in words is "one hundred forty-five million, nine hundred twenty-three thousand, six hundred forty-two".