145331401 has 2 divisors, whose sum is σ = 145331402. Its totient is φ = 145331400.

The previous prime is 145331369. The next prime is 145331413. The reversal of 145331401 is 104133541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132227001 + 13104400 = 11499^2 + 3620^2 .

It is an emirp because it is prime and its reverse (104133541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145331401 - 2⁵ = 145331369 is a prime.

It is a super-2 number, since 2×145331401² = 42242432233245602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145331201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72665700 + 72665701.

It is an arithmetic number, because the mean of its divisors is an integer number (72665701).

Almost surely, 2^145331401 is an apocalyptic number.

It is an amenable number.

145331401 is a deficient number, since it is larger than the sum of its proper divisors (1).

145331401 is an equidigital number, since it uses as much as digits as its factorization.

145331401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 145331401 is about 12055.3474027089. The cubic root of 145331401 is about 525.7587227795.

Adding to 145331401 its reverse (104133541), we get a palindrome (249464942).

The spelling of 145331401 in words is "one hundred forty-five million, three hundred thirty-one thousand, four hundred one".