145171954 has 4 divisors (see below), whose sum is σ = 217757934. Its totient is φ = 72585976.

The previous prime is 145171927. The next prime is 145171963. The reversal of 145171954 is 459171541.

145171954 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 101545929 + 43626025 = 10077^2 + 6605^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36292987 + ... + 36292990.

Almost surely, 2^145171954 is an apocalyptic number.

145171954 is a deficient number, since it is larger than the sum of its proper divisors (72585980).

145171954 is an equidigital number, since it uses as much as digits as its factorization.

145171954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72585979.

The product of its digits is 25200, while the sum is 37.

The square root of 145171954 is about 12048.7324644545. The cubic root of 145171954 is about 525.5663777281.

It can be divided in two parts, 14517 and 1954, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 145171954 in words is "one hundred forty-five million, one hundred seventy-one thousand, nine hundred fifty-four".