145572640 has 24 divisors (see below), whose sum is σ = 343915740. Its totient is φ = 58228992.

The previous prime is 145572631. The next prime is 145572643. The reversal of 145572640 is 46275541.

It can be written as a sum of positive squares in 2 ways, for example, as 143712144 + 1860496 = 11988^2 + 1364^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145572596 and 145572605.

It is not an unprimeable number, because it can be changed into a prime (145572643) 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, 454755 + ... + 455074.

Almost surely, 2^145572640 is an apocalyptic number.

145572640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145572640 is an abundant number, since it is smaller than the sum of its proper divisors (198343100).

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

145572640 is an equidigital number, since it uses as much as digits as its factorization.

145572640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909844 (or 909836 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 145572640 is about 12065.3487309733. The cubic root of 145572640 is about 526.0494683774.

The spelling of 145572640 in words is "one hundred forty-five million, five hundred seventy-two thousand, six hundred forty".