145421267 has 4 divisors (see below), whose sum is σ = 145599216. Its totient is φ = 145243320.

The previous prime is 145421261. The next prime is 145421273. The reversal of 145421267 is 762124541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 762124541 = 179 ⋅4257679.

It is an interprime number because it is at equal distance from previous prime (145421261) and next prime (145421273).

It is a cyclic number.

It is not a de Polignac number, because 145421267 - 2⁴ = 145421251 is a prime.

It is a super-2 number, since 2×145421267² = 42294689791770578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145421261) 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, 87743 + ... + 89384.

It is an arithmetic number, because the mean of its divisors is an integer number (36399804).

Almost surely, 2^145421267 is an apocalyptic number.

145421267 is a deficient number, since it is larger than the sum of its proper divisors (177949).

145421267 is an equidigital number, since it uses as much as digits as its factorization.

145421267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177948.

The product of its digits is 13440, while the sum is 32.

The square root of 145421267 is about 12059.0740523475. The cubic root of 145421267 is about 525.8670684818.

The spelling of 145421267 in words is "one hundred forty-five million, four hundred twenty-one thousand, two hundred sixty-seven".