145305620 has 12 divisors (see below), whose sum is σ = 305141844. Its totient is φ = 58122240.

The previous prime is 145305617. The next prime is 145305637. The reversal of 145305620 is 26503541.

It can be written as a sum of positive squares in 2 ways, for example, as 69022864 + 76282756 = 8308^2 + 8734^2 .

It is a super-2 number, since 2×145305620² = 42227446407168800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145305620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3632621 + ... + 3632660.

It is an arithmetic number, because the mean of its divisors is an integer number (25428487).

Almost surely, 2^145305620 is an apocalyptic number.

145305620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145305620 is an abundant number, since it is smaller than the sum of its proper divisors (159836224).

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

145305620 is a wasteful number, since it uses less digits than its factorization.

145305620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7265290 (or 7265288 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 145305620 is about 12054.2780787569. The cubic root of 145305620 is about 525.7276320285.

The spelling of 145305620 in words is "one hundred forty-five million, three hundred five thousand, six hundred twenty".