145555740 has 216 divisors, whose sum is σ = 500192784. Its totient is φ = 34214400.

The previous prime is 145555733. The next prime is 145555747. The reversal of 145555740 is 47555541.

145555740 is a `hidden beast` number, since 14 + 55 + 557 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (145555733) and next prime (145555747).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 145555695 and 145555704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145555747) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 892899 + ... + 893061.

Almost surely, 2^145555740 is an apocalyptic number.

145555740 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 145555740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250096392).

145555740 is an abundant number, since it is smaller than the sum of its proper divisors (354637044).

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

145555740 is a wasteful number, since it uses less digits than its factorization.

145555740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 36.

The square root of 145555740 is about 12064.6483579092. The cubic root of 145555740 is about 526.0291106598.

The spelling of 145555740 in words is "one hundred forty-five million, five hundred fifty-five thousand, seven hundred forty".