145615949 has 4 divisors (see below), whose sum is σ = 145653180. Its totient is φ = 145578720.

The previous prime is 145615927. The next prime is 145615957. The reversal of 145615949 is 949516541.

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 63840100 + 81775849 = 7990^2 + 9043^2 .

It is a cyclic number.

It is not a de Polignac number, because 145615949 - 2¹² = 145611853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145615909) 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, 11954 + ... + 20835.

It is an arithmetic number, because the mean of its divisors is an integer number (36413295).

Almost surely, 2^145615949 is an apocalyptic number.

It is an amenable number.

145615949 is a deficient number, since it is larger than the sum of its proper divisors (37231).

145615949 is an equidigital number, since it uses as much as digits as its factorization.

145615949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37230.

The product of its digits is 194400, while the sum is 44.

The square root of 145615949 is about 12067.1433653537. The cubic root of 145615949 is about 526.1016311497.

The spelling of 145615949 in words is "one hundred forty-five million, six hundred fifteen thousand, nine hundred forty-nine".