145577775 has 48 divisors (see below), whose sum is σ = 280736000. Its totient is φ = 66538080.

The previous prime is 145577771. The next prime is 145577813. The reversal of 145577775 is 577775541.

It is not a de Polignac number, because 145577775 - 2² = 145577771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145577771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22896 + ... + 28554.

Almost surely, 2^145577775 is an apocalyptic number.

145577775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145577775 is a deficient number, since it is larger than the sum of its proper divisors (135158225).

145577775 is an equidigital number, since it uses as much as digits as its factorization.

145577775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5693 (or 5674 counting only the distinct ones).

The product of its digits is 1200500, while the sum is 48.

The square root of 145577775 is about 12065.5615285821. The cubic root of 145577775 is about 526.0556536794.

The spelling of 145577775 in words is "one hundred forty-five million, five hundred seventy-seven thousand, seven hundred seventy-five".