145422061 has 4 divisors (see below), whose sum is σ = 145554300. Its totient is φ = 145289824.

The previous prime is 145422049. The next prime is 145422083. The reversal of 145422061 is 160224541.

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 2 ways, for example, as 48024900 + 97397161 = 6930^2 + 9869^2 .

It is a cyclic number.

It is not a de Polignac number, because 145422061 - 2⁷ = 145421933 is a prime.

It is a super-2 number, since 2×145422061² = 42295151650975442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145422461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64456 + ... + 66673.

It is an arithmetic number, because the mean of its divisors is an integer number (36388575).

Almost surely, 2^145422061 is an apocalyptic number.

It is an amenable number.

145422061 is a deficient number, since it is larger than the sum of its proper divisors (132239).

145422061 is a wasteful number, since it uses less digits than its factorization.

145422061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132238.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 145422061 is about 12059.1069735698. The cubic root of 145422061 is about 525.8680255580.

The spelling of 145422061 in words is "one hundred forty-five million, four hundred twenty-two thousand, sixty-one".