145212947 has 18 divisors (see below), whose sum is σ = 165423804. Its totient is φ = 127370320.

The previous prime is 145212937. The next prime is 145212973. The reversal of 145212947 is 749212541.

It is not a de Polignac number, because 145212947 - 2¹⁰ = 145211923 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145212937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 101048 + ... + 102474.

Almost surely, 2^145212947 is an apocalyptic number.

145212947 is a deficient number, since it is larger than the sum of its proper divisors (20210857).

145212947 is a wasteful number, since it uses less digits than its factorization.

145212947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507 (or 1467 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 145212947 is about 12050.4334776804. The cubic root of 145212947 is about 525.6158420917.

The spelling of 145212947 in words is "one hundred forty-five million, two hundred twelve thousand, nine hundred forty-seven".