145078831 has 4 divisors (see below), whose sum is σ = 146221312. Its totient is φ = 143936352.

The previous prime is 145078819. The next prime is 145078841. The reversal of 145078831 is 138870541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145078831 is a prime.

It is a super-2 number, since 2×145078831² = 42095734408653122, 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 (145078841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571050 + ... + 571303.

It is an arithmetic number, because the mean of its divisors is an integer number (36555328).

Almost surely, 2^145078831 is an apocalyptic number.

145078831 is a deficient number, since it is larger than the sum of its proper divisors (1142481).

145078831 is a wasteful number, since it uses less digits than its factorization.

145078831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142480.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 145078831 is about 12044.8674131349. The cubic root of 145078831 is about 525.4539758830.

The spelling of 145078831 in words is "one hundred forty-five million, seventy-eight thousand, eight hundred thirty-one".