145121349 has 4 divisors (see below), whose sum is σ = 193495136. Its totient is φ = 96747564.

The previous prime is 145121309. The next prime is 145121351. The reversal of 145121349 is 943121541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 943121541 = 3 ⋅314373847.

It is not a de Polignac number, because 145121349 - 2²³ = 136732741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145121309) 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, 24186889 + ... + 24186894.

It is an arithmetic number, because the mean of its divisors is an integer number (48373784).

Almost surely, 2^145121349 is an apocalyptic number.

It is an amenable number.

145121349 is a deficient number, since it is larger than the sum of its proper divisors (48373787).

145121349 is an equidigital number, since it uses as much as digits as its factorization.

145121349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48373786.

The product of its digits is 4320, while the sum is 30.

The square root of 145121349 is about 12046.6322679826. The cubic root of 145121349 is about 525.5053021627.

The spelling of 145121349 in words is "one hundred forty-five million, one hundred twenty-one thousand, three hundred forty-nine".