145372720 has 20 divisors (see below), whose sum is σ = 337991760. Its totient is φ = 58149056.

The previous prime is 145372697. The next prime is 145372727. The reversal of 145372720 is 27273541.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×145372720² = 42266455440396800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145372727) 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 3 ways as a sum of consecutive naturals, for example, 908500 + ... + 908659.

It is an arithmetic number, because the mean of its divisors is an integer number (16899588).

Almost surely, 2^145372720 is an apocalyptic number.

145372720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145372720 is an abundant number, since it is smaller than the sum of its proper divisors (192619040).

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

145372720 is a wasteful number, since it uses less digits than its factorization.

145372720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817172 (or 1817166 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 145372720 is about 12057.0610017533. The cubic root of 145372720 is about 525.8085440067.

The spelling of 145372720 in words is "one hundred forty-five million, three hundred seventy-two thousand, seven hundred twenty".