145617720 has 32 divisors (see below), whose sum is σ = 436853520. Its totient is φ = 38831360.

The previous prime is 145617697. The next prime is 145617721. The reversal of 145617720 is 27716541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145617721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606621 + ... + 606860.

Almost surely, 2^145617720 is an apocalyptic number.

145617720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145617720 is an abundant number, since it is smaller than the sum of its proper divisors (291235800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145617720 is a wasteful number, since it uses less digits than its factorization.

145617720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213495 (or 1213491 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 145617720 is about 12067.2167462095. The cubic root of 145617720 is about 526.1037639798.

The spelling of 145617720 in words is "one hundred forty-five million, six hundred seventeen thousand, seven hundred twenty".