1387420140545 has 8 divisors (see below), whose sum is σ = 1664935405224. Its totient is φ = 1109915288064.

The previous prime is 1387420140541. The next prime is 1387420140571. The reversal of 1387420140545 is 5450410247831.

It is a happy number.

It is a Cunningham number, because it is equal to 1177888²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 1387420140544 = 1^2 + 1177888^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1387420140545 - 2² = 1387420140541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1387420140496 and 1387420140505.

It is not an unprimeable number, because it can be changed into a prime (1387420140541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2306834 + ... + 2845403.

It is an arithmetic number, because the mean of its divisors is an integer number (208116925653).

Almost surely, 2^{1387420140545} is an apocalyptic number.

It is an amenable number.

1387420140545 is a deficient number, since it is larger than the sum of its proper divisors (277515264679).

1387420140545 is an equidigital number, since it uses as much as digits as its factorization.

1387420140545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206099.

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 1387420140545 in words is "one trillion, three hundred eighty-seven billion, four hundred twenty million, one hundred forty thousand, five hundred forty-five".