145505842 has 4 divisors (see below), whose sum is σ = 218258766. Its totient is φ = 72752920.

The previous prime is 145505837. The next prime is 145505849. The reversal of 145505842 is 248505541.

It is a happy number.

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., 141348321 + 4157521 = 11889^2 + 2039^2 .

It is a super-2 number, since 2×145505842² = 42343900112257928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145505798 and 145505807.

It is not an unprimeable number, because it can be changed into a prime (145505849) 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, 36376459 + ... + 36376462.

Almost surely, 2^145505842 is an apocalyptic number.

145505842 is a deficient number, since it is larger than the sum of its proper divisors (72752924).

145505842 is an equidigital number, since it uses as much as digits as its factorization.

145505842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72752923.

The product of its (nonzero) digits is 32000, while the sum is 34.

The square root of 145505842 is about 12062.5802380751. The cubic root of 145505842 is about 525.9689943990.

The spelling of 145505842 in words is "one hundred forty-five million, five hundred five thousand, eight hundred forty-two".