1361252140 has 12 divisors (see below), whose sum is σ = 2858629536. Its totient is φ = 544500848.

The previous prime is 1361252077. The next prime is 1361252143. The reversal of 1361252140 is 412521631.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1361252143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34031284 + ... + 34031323.

It is an arithmetic number, because the mean of its divisors is an integer number (238219128).

Almost surely, 2^1361252140 is an apocalyptic number.

1361252140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1361252140 is an abundant number, since it is smaller than the sum of its proper divisors (1497377396).

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

1361252140 is a wasteful number, since it uses less digits than its factorization.

1361252140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68062616 (or 68062614 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1361252140 is about 36895.1506298592. The cubic root of 1361252140 is about 1108.2715680180.

Adding to 1361252140 its reverse (412521631), we get a palindrome (1773773771).

The spelling of 1361252140 in words is "one billion, three hundred sixty-one million, two hundred fifty-two thousand, one hundred forty".