1375555140 has 36 divisors (see below), whose sum is σ = 4172517804. Its totient is φ = 366814656.

The previous prime is 1375555127. The next prime is 1375555171. The reversal of 1375555140 is 415555731.

It is a happy number.

1375555140 is a `hidden beast` number, since 13 + 7 + 55 + 551 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 569108736 + 806446404 = 23856^2 + 28398^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1375555095 and 1375555104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3820807 + ... + 3821166.

Almost surely, 2^1375555140 is an apocalyptic number.

1375555140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1375555140 is an abundant number, since it is smaller than the sum of its proper divisors (2796962664).

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

1375555140 is a wasteful number, since it uses less digits than its factorization.

1375555140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7641988 (or 7641983 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The square root of 1375555140 is about 37088.4771863176. The cubic root of 1375555140 is about 1112.1396760956.

The spelling of 1375555140 in words is "one billion, three hundred seventy-five million, five hundred fifty-five thousand, one hundred forty".