1406142121145 has 4 divisors (see below), whose sum is σ = 1687370545380. Its totient is φ = 1124913696912.

The previous prime is 1406142121093. The next prime is 1406142121147. The reversal of 1406142121145 is 5411212416041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 502053022249 + 904089098896 = 708557^2 + 950836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406142121145 - 2²² = 1406137926841 is a prime.

It is a super-2 number, since 2×1406142121145² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1406142121147) 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, 140614212110 + ... + 140614212119.

It is an arithmetic number, because the mean of its divisors is an integer number (421842636345).

Almost surely, 2^{1406142121145} is an apocalyptic number.

It is an amenable number.

1406142121145 is a deficient number, since it is larger than the sum of its proper divisors (281228424235).

1406142121145 is an equidigital number, since it uses as much as digits as its factorization.

1406142121145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281228424234.

The product of its (nonzero) digits is 7680, while the sum is 32.

Adding to 1406142121145 its reverse (5411212416041), we get a palindrome (6817354537186).

The spelling of 1406142121145 in words is "one trillion, four hundred six billion, one hundred forty-two million, one hundred twenty-one thousand, one hundred forty-five".