145428649 has 8 divisors (see below), whose sum is σ = 150885000. Its totient is φ = 140001792.

The previous prime is 145428637. The next prime is 145428653. The reversal of 145428649 is 946824541.

It can be written as a sum of positive squares in 4 ways, for example, as 43560000 + 101868649 = 6600^2 + 10093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145428649 - 2⁵ = 145428617 is a prime.

It is a super-2 number, since 2×145428649² = 42298983899930402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145228649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2937 + ... + 17305.

It is an arithmetic number, because the mean of its divisors is an integer number (18860625).

Almost surely, 2^145428649 is an apocalyptic number.

It is an amenable number.

145428649 is a deficient number, since it is larger than the sum of its proper divisors (5456351).

145428649 is a wasteful number, since it uses less digits than its factorization.

145428649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14747.

The product of its digits is 276480, while the sum is 43.

The square root of 145428649 is about 12059.3801250313. The cubic root of 145428649 is about 525.8759665041.

It can be divided in two parts, 1454 and 28649, that added together give a palindrome (30103).

The spelling of 145428649 in words is "one hundred forty-five million, four hundred twenty-eight thousand, six hundred forty-nine".