145121512 has 8 divisors (see below), whose sum is σ = 272102850. Its totient is φ = 72560752.

The previous prime is 145121491. The next prime is 145121521. The reversal of 145121512 is 215121541.

It can be written as a sum of positive squares in only one way, i.e., 126922756 + 18198756 = 11266^2 + 4266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×145121512² = 42120506490332288, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9070087 + ... + 9070102.

Almost surely, 2^145121512 is an apocalyptic number.

It is an amenable number.

145121512 is a deficient number, since it is larger than the sum of its proper divisors (126981338).

145121512 is a wasteful number, since it uses less digits than its factorization.

145121512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18140195 (or 18140191 counting only the distinct ones).

The product of its digits is 400, while the sum is 22.

The square root of 145121512 is about 12046.6390333570. The cubic root of 145121512 is about 525.5054989115.

The spelling of 145121512 in words is "one hundred forty-five million, one hundred twenty-one thousand, five hundred twelve".