145309556 has 24 divisors (see below), whose sum is σ = 297380160. Its totient is φ = 60826752.

The previous prime is 145309537. The next prime is 145309559. The reversal of 145309556 is 655903541.

It is a super-2 number, since 2×145309556² = 42229734129834272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145309559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59141 + ... + 61548.

It is an arithmetic number, because the mean of its divisors is an integer number (12390840).

Almost surely, 2^145309556 is an apocalyptic number.

It is an amenable number.

145309556 is an abundant number, since it is smaller than the sum of its proper divisors (152070604).

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

145309556 is a wasteful number, since it uses less digits than its factorization.

145309556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120743 (or 120741 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 145309556 is about 12054.4413391911. The cubic root of 145309556 is about 525.7323789091.

The spelling of 145309556 in words is "one hundred forty-five million, three hundred nine thousand, five hundred fifty-six".