145687775 has 6 divisors (see below), whose sum is σ = 180652872. Its totient is φ = 116550200.

The previous prime is 145687757. The next prime is 145687777. The reversal of 145687775 is 577786541.

It is not a de Polignac number, because 145687775 - 2⁸ = 145687519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145687777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2913731 + ... + 2913780.

It is an arithmetic number, because the mean of its divisors is an integer number (30108812).

Almost surely, 2^145687775 is an apocalyptic number.

145687775 is a deficient number, since it is larger than the sum of its proper divisors (34965097).

145687775 is an equidigital number, since it uses as much as digits as its factorization.

145687775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5827521 (or 5827516 counting only the distinct ones).

The product of its digits is 1646400, while the sum is 50.

The square root of 145687775 is about 12070.1190963470. The cubic root of 145687775 is about 526.1881179316.

The spelling of 145687775 in words is "one hundred forty-five million, six hundred eighty-seven thousand, seven hundred seventy-five".