145213403 has 4 divisors (see below), whose sum is σ = 145248840. Its totient is φ = 145177968.

The previous prime is 145213399. The next prime is 145213427. The reversal of 145213403 is 304312541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304312541 = 13 ⋅23408657.

It is a cyclic number.

It is not a de Polignac number, because 145213403 - 2² = 145213399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145213433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10625 + ... + 20082.

It is an arithmetic number, because the mean of its divisors is an integer number (36312210).

Almost surely, 2^145213403 is an apocalyptic number.

145213403 is a deficient number, since it is larger than the sum of its proper divisors (35437).

145213403 is an equidigital number, since it uses as much as digits as its factorization.

145213403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35436.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 145213403 is about 12050.4523981467. The cubic root of 145213403 is about 525.6163922736.

Adding to 145213403 its reverse (304312541), we get a palindrome (449525944).

The spelling of 145213403 in words is "one hundred forty-five million, two hundred thirteen thousand, four hundred three".