1375201780 has 12 divisors (see below), whose sum is σ = 2887923780. Its totient is φ = 550080704.

The previous prime is 1375201777. The next prime is 1375201783. The reversal of 1375201780 is 871025731.

It is an interprime number because it is at equal distance from previous prime (1375201777) and next prime (1375201783).

It can be written as a sum of positive squares in 2 ways, for example, as 911919204 + 463282576 = 30198^2 + 21524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375201783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34380025 + ... + 34380064.

It is an arithmetic number, because the mean of its divisors is an integer number (240660315).

Almost surely, 2^1375201780 is an apocalyptic number.

1375201780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1375201780 is an abundant number, since it is smaller than the sum of its proper divisors (1512722000).

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

1375201780 is a wasteful number, since it uses less digits than its factorization.

1375201780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68760098 (or 68760096 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 1375201780 is about 37083.7131366318. The cubic root of 1375201780 is about 1112.0444371335.

The spelling of 1375201780 in words is "one billion, three hundred seventy-five million, two hundred one thousand, seven hundred eighty".