1361531472 has 80 divisors (see below), whose sum is σ = 4037693952. Its totient is φ = 387273600.

The previous prime is 1361531471. The next prime is 1361531473. The reversal of 1361531472 is 2741351631.

It is an interprime number because it is at equal distance from previous prime (1361531471) and next prime (1361531473).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361531471) 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, 67347 + ... + 85197.

Almost surely, 2^1361531472 is an apocalyptic number.

1361531472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1361531472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2018846976).

1361531472 is an abundant number, since it is smaller than the sum of its proper divisors (2676162480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1361531472 is a wasteful number, since it uses less digits than its factorization.

1361531472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18096 (or 18090 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 1361531472 is about 36898.9359196170. The cubic root of 1361531472 is about 1108.3473694393.

The spelling of 1361531472 in words is "one billion, three hundred sixty-one million, five hundred thirty-one thousand, four hundred seventy-two".