145401231 has 8 divisors (see below), whose sum is σ = 199108144. Its totient is φ = 94314240.

The previous prime is 145401229. The next prime is 145401241. The reversal of 145401231 is 132104541.

145401231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145401231 - 2¹ = 145401229 is a prime.

It is a super-2 number, since 2×145401231² = 42283035952630722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145401198 and 145401207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145401241) 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, 654850 + ... + 655071.

It is an arithmetic number, because the mean of its divisors is an integer number (24888518).

Almost surely, 2^145401231 is an apocalyptic number.

145401231 is a deficient number, since it is larger than the sum of its proper divisors (53706913).

145401231 is a wasteful number, since it uses less digits than its factorization.

145401231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309961.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 145401231 is about 12058.2432800139. The cubic root of 145401231 is about 525.8429162224.

Adding to 145401231 its reverse (132104541), we get a palindrome (277505772).

The spelling of 145401231 in words is "one hundred forty-five million, four hundred one thousand, two hundred thirty-one".