145114021 has 4 divisors (see below), whose sum is σ = 156276652. Its totient is φ = 133951392.

The previous prime is 145114019. The next prime is 145114043. The reversal of 145114021 is 120411541.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12173121 + 132940900 = 3489^2 + 11530^2 .

It is a cyclic number.

It is not a de Polignac number, because 145114021 - 2¹ = 145114019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145114021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145118021) 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, 5581296 + ... + 5581321.

It is an arithmetic number, because the mean of its divisors is an integer number (39069163).

Almost surely, 2^145114021 is an apocalyptic number.

It is an amenable number.

145114021 is a deficient number, since it is larger than the sum of its proper divisors (11162631).

145114021 is a wasteful number, since it uses less digits than its factorization.

145114021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11162630.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 145114021 is about 12046.3281127487. The cubic root of 145114021 is about 525.4964567661.

Adding to 145114021 its reverse (120411541), we get a palindrome (265525562).

The spelling of 145114021 in words is "one hundred forty-five million, one hundred fourteen thousand, twenty-one".