145101720 has 32 divisors (see below), whose sum is σ = 435305520. Its totient is φ = 38693760.

The previous prime is 145101673. The next prime is 145101721. The reversal of 145101720 is 27101541.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145101721) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 604471 + ... + 604710.

Almost surely, 2^145101720 is an apocalyptic number.

145101720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145101720 is an abundant number, since it is smaller than the sum of its proper divisors (290203800).

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

145101720 is a wasteful number, since it uses less digits than its factorization.

145101720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209195 (or 1209191 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 145101720 is about 12045.8175314090. The cubic root of 145101720 is about 525.4816079492.

The spelling of 145101720 in words is "one hundred forty-five million, one hundred one thousand, seven hundred twenty".