145375421 has 2 divisors, whose sum is σ = 145375422. Its totient is φ = 145375420.

The previous prime is 145375409. The next prime is 145375453. The reversal of 145375421 is 124573541.

It is an a-pointer prime, because the next prime (145375453) can be obtained adding 145375421 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102616900 + 42758521 = 10130^2 + 6539^2 .

It is a cyclic number.

It is not a de Polignac number, because 145375421 - 2²⁶ = 78266557 is a prime.

It is a super-2 number, since 2×145375421² = 42268026061854482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145375121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72687710 + 72687711.

It is an arithmetic number, because the mean of its divisors is an integer number (72687711).

Almost surely, 2^145375421 is an apocalyptic number.

It is an amenable number.

145375421 is a deficient number, since it is larger than the sum of its proper divisors (1).

145375421 is an equidigital number, since it uses as much as digits as its factorization.

145375421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 32.

The square root of 145375421 is about 12057.1730102873. The cubic root of 145375421 is about 525.8118004638.

The spelling of 145375421 in words is "one hundred forty-five million, three hundred seventy-five thousand, four hundred twenty-one".