145642149 has 24 divisors (see below), whose sum is σ = 215423520. Its totient is φ = 94786848.

The previous prime is 145642139. The next prime is 145642151. The reversal of 145642149 is 941246541.

145642149 is a `hidden beast` number, since 1 + 4 + 5 + 642 + 1 + 4 + 9 = 666.

It is not a de Polignac number, because 145642149 - 2¹⁷ = 145511077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145642139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82494 + ... + 84240.

It is an arithmetic number, because the mean of its divisors is an integer number (8975980).

Almost surely, 2^145642149 is an apocalyptic number.

It is an amenable number.

145642149 is a deficient number, since it is larger than the sum of its proper divisors (69781371).

145642149 is a wasteful number, since it uses less digits than its factorization.

145642149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969 (or 1966 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 145642149 is about 12068.2289089990. The cubic root of 145642149 is about 526.1331822635.

The spelling of 145642149 in words is "one hundred forty-five million, six hundred forty-two thousand, one hundred forty-nine".