145740 has 48 divisors (see below), whose sum is σ = 467712. Its totient is φ = 33216.

The previous prime is 145723. The next prime is 145753. The reversal of 145740 is 47541.

It is a super-3 number, since 3×145740³ = 9286617333672000, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247 + ... + 593.

It is an arithmetic number, because the mean of its divisors is an integer number (9744).

2¹⁴⁵⁷⁴⁰ is an apocalyptic number.

145740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233856).

145740 is an abundant number, since it is smaller than the sum of its proper divisors (321972).

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

145740 is a wasteful number, since it uses less digits than its factorization.

145740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 145740 is about 381.7590863359. The cubic root of 145740 is about 52.6250985004.

The spelling of 145740 in words is "one hundred forty-five thousand, seven hundred forty".