145134431 has 8 divisors (see below), whose sum is σ = 157094784. Its totient is φ = 133287840.

The previous prime is 145134419. The next prime is 145134443. The reversal of 145134431 is 134431541.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (145134419) and next prime (145134443).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145134431 is a prime.

It is a super-2 number, since 2×145134431² = 42128006123387522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145134431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145134401) 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, 25775 + ... + 30896.

It is an arithmetic number, because the mean of its divisors is an integer number (19636848).

Almost surely, 2^145134431 is an apocalyptic number.

145134431 is a deficient number, since it is larger than the sum of its proper divisors (11960353).

145134431 is a wasteful number, since it uses less digits than its factorization.

145134431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56881.

The product of its digits is 2880, while the sum is 26.

The square root of 145134431 is about 12047.1752290734. The cubic root of 145134431 is about 525.5210922902.

Adding to 145134431 its reverse (134431541), we get a palindrome (279565972).

The spelling of 145134431 in words is "one hundred forty-five million, one hundred thirty-four thousand, four hundred thirty-one".