145687546 has 4 divisors (see below), whose sum is σ = 218531322. Its totient is φ = 72843772.

The previous prime is 145687523. The next prime is 145687567. The reversal of 145687546 is 645786541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 75881521 + 69806025 = 8711^2 + 8355^2 .

It is a super-2 number, since 2×145687546² = 42449722119004232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145687496 and 145687505.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36421885 + ... + 36421888.

Almost surely, 2^145687546 is an apocalyptic number.

145687546 is a deficient number, since it is larger than the sum of its proper divisors (72843776).

145687546 is an equidigital number, since it uses as much as digits as its factorization.

145687546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72843775.

The product of its digits is 806400, while the sum is 46.

The square root of 145687546 is about 12070.1096101071. The cubic root of 145687546 is about 526.1878422344.

The spelling of 145687546 in words is "one hundred forty-five million, six hundred eighty-seven thousand, five hundred forty-six".