145297644 has 12 divisors (see below), whose sum is σ = 339027864. Its totient is φ = 48432544.

The previous prime is 145297643. The next prime is 145297681. The reversal of 145297644 is 446792541.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×145297644² = 42222810703901472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145297596 and 145297605.

It is not an unprimeable number, because it can be changed into a prime (145297643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6054057 + ... + 6054080.

It is an arithmetic number, because the mean of its divisors is an integer number (28252322).

Almost surely, 2^145297644 is an apocalyptic number.

It is an amenable number.

145297644 is an abundant number, since it is smaller than the sum of its proper divisors (193730220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145297644 is a wasteful number, since it uses less digits than its factorization.

145297644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12108144 (or 12108142 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 145297644 is about 12053.9472373161. The cubic root of 145297644 is about 525.7180125788.

The spelling of 145297644 in words is "one hundred forty-five million, two hundred ninety-seven thousand, six hundred forty-four".