145214503 has 4 divisors (see below), whose sum is σ = 165959440. Its totient is φ = 124469568.

The previous prime is 145214471. The next prime is 145214507. The reversal of 145214503 is 305412541.

It is a happy number.

145214503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 145214503 - 2⁵ = 145214471 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145214507) 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, 10372458 + ... + 10372471.

It is an arithmetic number, because the mean of its divisors is an integer number (41489860).

Almost surely, 2^145214503 is an apocalyptic number.

145214503 is a deficient number, since it is larger than the sum of its proper divisors (20744937).

145214503 is an equidigital number, since it uses as much as digits as its factorization.

145214503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20744936.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 145214503 is about 12050.4980395003. The cubic root of 145214503 is about 525.6177194618.

The spelling of 145214503 in words is "one hundred forty-five million, two hundred fourteen thousand, five hundred three".