145787531 has 8 divisors (see below), whose sum is σ = 147148560. Its totient is φ = 144432288.

The previous prime is 145787519. The next prime is 145787549. The reversal of 145787531 is 135787541.

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 145787531 - 2¹⁰ = 145786507 is a prime.

It is a super-2 number, since 2×145787531² = 42508008390151922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145787581) 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 7 ways as a sum of consecutive naturals, for example, 61160 + ... + 63498.

It is an arithmetic number, because the mean of its divisors is an integer number (18393570).

Almost surely, 2^145787531 is an apocalyptic number.

145787531 is a deficient number, since it is larger than the sum of its proper divisors (1361029).

145787531 is a wasteful number, since it uses less digits than its factorization.

145787531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893.

The product of its digits is 117600, while the sum is 41.

The square root of 145787531 is about 12074.2507427997. The cubic root of 145787531 is about 526.3081885094.

It can be divided in two parts, 1457 and 87531, that added together give a palindrome (88988).

The spelling of 145787531 in words is "one hundred forty-five million, seven hundred eighty-seven thousand, five hundred thirty-one".