145646874 has 48 divisors (see below), whose sum is σ = 335317320. Its totient is φ = 45601920.

The previous prime is 145646873. The next prime is 145646881. The reversal of 145646874 is 478646541.

145646874 is a `hidden beast` number, since 1 + 4 + 564 + 6 + 87 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 126225225 + 19421649 = 11235^2 + 4407^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145646873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15544 + ... + 23084.

Almost surely, 2^145646874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145646874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167658660).

145646874 is an abundant number, since it is smaller than the sum of its proper divisors (189670446).

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

145646874 is a wasteful number, since it uses less digits than its factorization.

145646874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7615 (or 7612 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 145646874 is about 12068.4246693593. The cubic root of 145646874 is about 526.1388718994.

The spelling of 145646874 in words is "one hundred forty-five million, six hundred forty-six thousand, eight hundred seventy-four".