145256540 has 48 divisors (see below), whose sum is σ = 358374240. Its totient is φ = 48756480.

The previous prime is 145256521. The next prime is 145256543. The reversal of 145256540 is 45652541.

It is a junction number, because it is equal to n+sod(n) for n = 145256497 and 145256506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145256543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22535 + ... + 28254.

It is an arithmetic number, because the mean of its divisors is an integer number (7466130).

Almost surely, 2^145256540 is an apocalyptic number.

145256540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145256540 is an abundant number, since it is smaller than the sum of its proper divisors (213117700).

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

145256540 is a wasteful number, since it uses less digits than its factorization.

145256540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50822 (or 50820 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 145256540 is about 12052.2421150589. The cubic root of 145256540 is about 525.6684335431.

The spelling of 145256540 in words is "one hundred forty-five million, two hundred fifty-six thousand, five hundred forty".