145317401 has 4 divisors (see below), whose sum is σ = 145578852. Its totient is φ = 145055952.

The previous prime is 145317379. The next prime is 145317409. The reversal of 145317401 is 104713541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76825225 + 68492176 = 8765^2 + 8276^2 .

It is a cyclic number.

It is not a de Polignac number, because 145317401 - 2¹⁰ = 145316377 is a prime.

It is a super-2 number, since 2×145317401² = 42234294066789602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145317409) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 129890 + ... + 131003.

It is an arithmetic number, because the mean of its divisors is an integer number (36394713).

Almost surely, 2^145317401 is an apocalyptic number.

It is an amenable number.

145317401 is a deficient number, since it is larger than the sum of its proper divisors (261451).

145317401 is an equidigital number, since it uses as much as digits as its factorization.

145317401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261450.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 145317401 is about 12054.7667335374. The cubic root of 145317401 is about 525.7418398521.

The spelling of 145317401 in words is "one hundred forty-five million, three hundred seventeen thousand, four hundred one".