145457720 has 16 divisors (see below), whose sum is σ = 327279960. Its totient is φ = 58183072.

The previous prime is 145457717. The next prime is 145457743. The reversal of 145457720 is 27754541.

It is a congruent number.

It is an unprimeable number.

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, 1818182 + ... + 1818261.

Almost surely, 2^145457720 is an apocalyptic number.

145457720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145457720 is an abundant number, since it is smaller than the sum of its proper divisors (181822240).

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

145457720 is a wasteful number, since it uses less digits than its factorization.

145457720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636454 (or 3636450 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 35.

The square root of 145457720 is about 12060.5853920944. The cubic root of 145457720 is about 525.9110048128.

The spelling of 145457720 in words is "one hundred forty-five million, four hundred fifty-seven thousand, seven hundred twenty".