145442001 has 8 divisors (see below), whose sum is σ = 194473440. Its totient is φ = 96685952.

The previous prime is 145441999. The next prime is 145442027. The reversal of 145442001 is 100244541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145442001 - 2¹ = 145441999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145402001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67611 + ... + 69728.

It is an arithmetic number, because the mean of its divisors is an integer number (24309180).

Almost surely, 2^145442001 is an apocalyptic number.

It is an amenable number.

145442001 is a deficient number, since it is larger than the sum of its proper divisors (49031439).

145442001 is a wasteful number, since it uses less digits than its factorization.

145442001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137695.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 145442001 is about 12059.9337062855. The cubic root of 145442001 is about 525.8920598050.

Adding to 145442001 its reverse (100244541), we get a palindrome (245686542).

The spelling of 145442001 in words is "one hundred forty-five million, four hundred forty-two thousand, one".