1239846945 has 32 divisors (see below), whose sum is σ = 2041804800. Its totient is φ = 642174144.

The previous prime is 1239846917. The next prime is 1239846973. The reversal of 1239846945 is 5496489321.

It is an interprime number because it is at equal distance from previous prime (1239846917) and next prime (1239846973).

It is not a de Polignac number, because 1239846945 - 2⁸ = 1239846689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65016 + ... + 81894.

It is an arithmetic number, because the mean of its divisors is an integer number (63806400).

Almost surely, 2^1239846945 is an apocalyptic number.

1239846945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1239846945 is a deficient number, since it is larger than the sum of its proper divisors (801957855).

1239846945 is a wasteful number, since it uses less digits than its factorization.

1239846945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17029.

The product of its digits is 1866240, while the sum is 51.

The square root of 1239846945 is about 35211.4604212890. The cubic root of 1239846945 is about 1074.2928668421.

The spelling of 1239846945 in words is "one billion, two hundred thirty-nine million, eight hundred forty-six thousand, nine hundred forty-five".