147661745 has 72 divisors (see below), whose sum is σ = 240711912. Its totient is φ = 86338560.

The previous prime is 147661739. The next prime is 147661747. The reversal of 147661745 is 547166741.

It can be written as a sum of positive squares in 4 ways, for example, as 67881121 + 79780624 = 8239^2 + 8932^2 .

It is not a de Polignac number, because 147661745 - 2⁴ = 147661729 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147661747) 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 71 ways as a sum of consecutive naturals, for example, 503819 + ... + 504111.

It is an arithmetic number, because the mean of its divisors is an integer number (3343221).

Almost surely, 2^147661745 is an apocalyptic number.

It is an amenable number.

147661745 is a deficient number, since it is larger than the sum of its proper divisors (93050167).

147661745 is a wasteful number, since it uses less digits than its factorization.

147661745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 333 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 147661745 is about 12151.6149132533. The cubic root of 147661745 is about 528.5539614215.

The spelling of 147661745 in words is "one hundred forty-seven million, six hundred sixty-one thousand, seven hundred forty-five".