1445731907 has 16 divisors (see below), whose sum is σ = 1596395520. Its totient is φ = 1303156800.

The previous prime is 1445731897. The next prime is 1445731909. The reversal of 1445731907 is 7091375441.

It is not a de Polignac number, because 1445731907 - 2⁶ = 1445731843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445731909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74807 + ... + 92127.

It is an arithmetic number, because the mean of its divisors is an integer number (99774720).

Almost surely, 2^1445731907 is an apocalyptic number.

1445731907 is a deficient number, since it is larger than the sum of its proper divisors (150663613).

1445731907 is a wasteful number, since it uses less digits than its factorization.

1445731907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17554.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 1445731907 is about 38022.7814211428. The cubic root of 1445731907 is about 1130.7395652002.

It can be divided in two parts, 14457 and 31907, that added together give a palindrome (46364).

The spelling of 1445731907 in words is "one billion, four hundred forty-five million, seven hundred thirty-one thousand, nine hundred seven".