145431401 has 4 divisors (see below), whose sum is σ = 147896400. Its totient is φ = 142966404.

The previous prime is 145431367. The next prime is 145431431. The reversal of 145431401 is 104134541.

145431401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104134541 = 7 ⋅14876363.

It is a cyclic number.

It is not a de Polignac number, because 145431401 - 2¹⁸ = 145169257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145431431) 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, 1232411 + ... + 1232528.

It is an arithmetic number, because the mean of its divisors is an integer number (36974100).

Almost surely, 2^145431401 is an apocalyptic number.

It is an amenable number.

145431401 is a deficient number, since it is larger than the sum of its proper divisors (2464999).

145431401 is an equidigital number, since it uses as much as digits as its factorization.

145431401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2464998.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 145431401 is about 12059.4942265420. The cubic root of 145431401 is about 525.8792835982.

Adding to 145431401 its reverse (104134541), we get a palindrome (249565942).

The spelling of 145431401 in words is "one hundred forty-five million, four hundred thirty-one thousand, four hundred one".