145721154 has 16 divisors (see below), whose sum is σ = 292096800. Its totient is φ = 48464640.

The previous prime is 145721129. The next prime is 145721167. The reversal of 145721154 is 451127541.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24352 + ... + 29739.

It is an arithmetic number, because the mean of its divisors is an integer number (18256050).

Almost surely, 2^145721154 is an apocalyptic number.

145721154 is an abundant number, since it is smaller than the sum of its proper divisors (146375646).

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

145721154 is a wasteful number, since it uses less digits than its factorization.

145721154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54545.

The product of its digits is 5600, while the sum is 30.

The square root of 145721154 is about 12071.5017292796. The cubic root of 145721154 is about 526.2283004200.

Adding to 145721154 its reverse (451127541), we get a palindrome (596848695).

The spelling of 145721154 in words is "one hundred forty-five million, seven hundred twenty-one thousand, one hundred fifty-four".