145971992 has 8 divisors (see below), whose sum is σ = 273697500. Its totient is φ = 72985992.

The previous prime is 145971983. The next prime is 145971997. The reversal of 145971992 is 299179541.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145971997) 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 as a sum of consecutive naturals, namely, 9123242 + ... + 9123257.

Almost surely, 2^145971992 is an apocalyptic number.

It is an amenable number.

145971992 is a deficient number, since it is larger than the sum of its proper divisors (127725508).

145971992 is a wasteful number, since it uses less digits than its factorization.

145971992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18246505 (or 18246501 counting only the distinct ones).

The product of its digits is 204120, while the sum is 47.

The square root of 145971992 is about 12081.8869387195. The cubic root of 145971992 is about 526.5300694371.

The spelling of 145971992 in words is "one hundred forty-five million, nine hundred seventy-one thousand, nine hundred ninety-two".