145723201 has 16 divisors (see below), whose sum is σ = 167411664. Its totient is φ = 125650944.

The previous prime is 145723199. The next prime is 145723241. The reversal of 145723201 is 102327541.

It is a happy number.

145723201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2322576 + 143400625 = 1524^2 + 11975^2 .

It is not a de Polignac number, because 145723201 - 2¹ = 145723199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145723241) 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, 27871 + ... + 32683.

It is an arithmetic number, because the mean of its divisors is an integer number (10463229).

Almost surely, 2^145723201 is an apocalyptic number.

It is an amenable number.

145723201 is a deficient number, since it is larger than the sum of its proper divisors (21688463).

145723201 is a wasteful number, since it uses less digits than its factorization.

145723201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4980.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 145723201 is about 12071.5865154502. The cubic root of 145723201 is about 526.2307644509.

It can be divided in two parts, 145723 and 201, that added together give a square (145924 = 382²).

The spelling of 145723201 in words is "one hundred forty-five million, seven hundred twenty-three thousand, two hundred one".