145359881 has 4 divisors (see below), whose sum is σ = 145486032. Its totient is φ = 145233732.

The previous prime is 145359871. The next prime is 145359901. The reversal of 145359881 is 188953541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145359881 - 2⁶ = 145359817 is a prime.

It is a super-2 number, since 2×145359881² = 42258990008668322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145359871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61331 + ... + 63656.

It is an arithmetic number, because the mean of its divisors is an integer number (36371508).

Almost surely, 2^145359881 is an apocalyptic number.

It is an amenable number.

145359881 is a deficient number, since it is larger than the sum of its proper divisors (126151).

145359881 is a wasteful number, since it uses less digits than its factorization.

145359881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126150.

The product of its digits is 172800, while the sum is 44.

The square root of 145359881 is about 12056.5285633967. The cubic root of 145359881 is about 525.7930641316.

The spelling of 145359881 in words is "one hundred forty-five million, three hundred fifty-nine thousand, eight hundred eighty-one".