145631684 has 12 divisors (see below), whose sum is σ = 278024208. Its totient is φ = 66196200.

The previous prime is 145631683. The next prime is 145631687. The reversal of 145631684 is 486136541.

Added to its reverse (486136541) it gives a square (631768225 = 25135²).

It is not an unprimeable number, because it can be changed into a prime (145631683) 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, 1654862 + ... + 1654949.

It is an arithmetic number, because the mean of its divisors is an integer number (23168684).

Almost surely, 2^145631684 is an apocalyptic number.

It is an amenable number.

145631684 is a deficient number, since it is larger than the sum of its proper divisors (132392524).

145631684 is a wasteful number, since it uses less digits than its factorization.

145631684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309826 (or 3309824 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 145631684 is about 12067.7953247476. The cubic root of 145631684 is about 526.1205803355.

Adding to 145631684 its reverse (486136541), we get a square (631768225 = 25135²).

The spelling of 145631684 in words is "one hundred forty-five million, six hundred thirty-one thousand, six hundred eighty-four".