1361442731 has 16 divisors (see below), whose sum is σ = 1502758656. Its totient is φ = 1223100000.

The previous prime is 1361442721. The next prime is 1361442751. The reversal of 1361442731 is 1372441631.

It is a cyclic number.

It is not a de Polignac number, because 1361442731 - 2¹⁰ = 1361441707 is a prime.

It is a super-2 number, since 2×1361442731² = 3707052619585476722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361442721) 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, 900266 + ... + 901776.

It is an arithmetic number, because the mean of its divisors is an integer number (93922416).

Almost surely, 2^1361442731 is an apocalyptic number.

1361442731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1361442731 is a deficient number, since it is larger than the sum of its proper divisors (141315925).

1361442731 is a wasteful number, since it uses less digits than its factorization.

1361442731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434.

The product of its digits is 12096, while the sum is 32.

The square root of 1361442731 is about 36897.7334127721. The cubic root of 1361442731 is about 1108.3232892049.

The spelling of 1361442731 in words is "one billion, three hundred sixty-one million, four hundred forty-two thousand, seven hundred thirty-one".