145240640 has 28 divisors (see below), whose sum is σ = 345855036. Its totient is φ = 58096128.

The previous prime is 145240637. The next prime is 145240643. The reversal of 145240640 is 46042541.

It is an interprime number because it is at equal distance from previous prime (145240637) and next prime (145240643).

It can be written as a sum of positive squares in 2 ways, for example, as 64384576 + 80856064 = 8024^2 + 8992^2 .

It is not an unprimeable number, because it can be changed into a prime (145240643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226619 + ... + 227258.

Almost surely, 2^145240640 is an apocalyptic number.

145240640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145240640 is an abundant number, since it is smaller than the sum of its proper divisors (200614396).

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

145240640 is an equidigital number, since it uses as much as digits as its factorization.

145240640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453894 (or 453884 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 145240640 is about 12051.5824687051. The cubic root of 145240640 is about 525.6492526900.

The spelling of 145240640 in words is "one hundred forty-five million, two hundred forty thousand, six hundred forty".