145024749 has 20 divisors (see below), whose sum is σ = 221930940. Its totient is φ = 94322880.

The previous prime is 145024717. The next prime is 145024753. The reversal of 145024749 is 947420541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29354724 + 115670025 = 5418^2 + 10755^2 .

It is not a de Polignac number, because 145024749 - 2⁵ = 145024717 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145024769) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18514 + ... + 25155.

It is an arithmetic number, because the mean of its divisors is an integer number (11096547).

Almost surely, 2^145024749 is an apocalyptic number.

It is an amenable number.

145024749 is a deficient number, since it is larger than the sum of its proper divisors (76906191).

145024749 is an equidigital number, since it uses as much as digits as its factorization.

145024749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43722 (or 43713 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 145024749 is about 12042.6221812361. The cubic root of 145024749 is about 525.3886754446.

The spelling of 145024749 in words is "one hundred forty-five million, twenty-four thousand, seven hundred forty-nine".