145123704 has 128 divisors (see below), whose sum is σ = 444787200. Its totient is φ = 43476480.

The previous prime is 145123703. The next prime is 145123709. The reversal of 145123704 is 407321541.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145123703) 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 31 ways as a sum of consecutive naturals, for example, 244432 + ... + 245024.

It is an arithmetic number, because the mean of its divisors is an integer number (3474900).

Almost surely, 2^145123704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145123704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222393600).

145123704 is an abundant number, since it is smaller than the sum of its proper divisors (299663496).

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

145123704 is a wasteful number, since it uses less digits than its factorization.

145123704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 145123704 is about 12046.7300127462. The cubic root of 145123704 is about 525.5081447454.

The spelling of 145123704 in words is "one hundred forty-five million, one hundred twenty-three thousand, seven hundred four".