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145427 = 413547

145427 has 4 divisors (see below), whose sum is σ = 149016. Its totient is φ = 141840.

The previous prime is 145423. The next prime is 145433. The reversal of 145427 is 724541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724541 = 4211721.

It is a cyclic number.

It is not a de Polignac number, because 145427 - 22 = 145423 is a prime.

It is a super-2 number, since 2×1454272 = 42298024658, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145427.

It is not an unprimeable number, because it can be changed into a prime (145423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1733 + ... + 1814.

It is an arithmetic number, because the mean of its divisors is an integer number (37254).

2145427 is an apocalyptic number.

145427 is a deficient number, since it is larger than the sum of its proper divisors (3589).

145427 is an equidigital number, since it uses as much as digits as its factorization.

145427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588.

The product of its digits is 1120, while the sum is 23.

The square root of 145427 is about 381.3489215928. The cubic root of 145427 is about 52.5873978879.

Adding to 145427 its reverse (724541), we get a palindrome (869968).

The spelling of 145427 in words is "one hundred forty-five thousand, four hundred twenty-seven".

Divisors: 1 41 3547 145427