145777540 has 12 divisors (see below), whose sum is σ = 306132876. Its totient is φ = 58311008.

The previous prime is 145777529. The next prime is 145777543. The reversal of 145777540 is 45777541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30558784 + 115218756 = 5528^2 + 10734^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145777493 and 145777502.

It is not an unprimeable number, because it can be changed into a prime (145777543) 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, 3644419 + ... + 3644458.

It is an arithmetic number, because the mean of its divisors is an integer number (25511073).

Almost surely, 2^145777540 is an apocalyptic number.

145777540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145777540 is an abundant number, since it is smaller than the sum of its proper divisors (160355336).

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

145777540 is a wasteful number, since it uses less digits than its factorization.

145777540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7288886 (or 7288884 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 40.

The square root of 145777540 is about 12073.8370040348. The cubic root of 145777540 is about 526.2961653841.

Subtracting from 145777540 its reverse (45777541), we obtain a palindrome (99999999).

The spelling of 145777540 in words is "one hundred forty-five million, seven hundred seventy-seven thousand, five hundred forty".