145517730 has 32 divisors (see below), whose sum is σ = 349731648. Its totient is φ = 38750400.

The previous prime is 145517717. The next prime is 145517731. The reversal of 145517730 is 37715541.

It is a junction number, because it is equal to n+sod(n) for n = 145517691 and 145517700.

It is not an unprimeable number, because it can be changed into a prime (145517731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21340 + ... + 27320.

It is an arithmetic number, because the mean of its divisors is an integer number (10929114).

Almost surely, 2^145517730 is an apocalyptic number.

145517730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145517730 is an abundant number, since it is smaller than the sum of its proper divisors (204213918).

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

145517730 is a wasteful number, since it uses less digits than its factorization.

145517730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6802.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 145517730 is about 12063.0729915723. The cubic root of 145517730 is about 525.9833181060.

The spelling of 145517730 in words is "one hundred forty-five million, five hundred seventeen thousand, seven hundred thirty".