1401521204939 has 2 divisors, whose sum is σ = 1401521204940. Its totient is φ = 1401521204938.

The previous prime is 1401521204933. The next prime is 1401521204969. The reversal of 1401521204939 is 9394021251041.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401521204939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1401521204896 and 1401521204905.

It is not a weakly prime, because it can be changed into another prime (1401521204933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700760602469 + 700760602470.

It is an arithmetic number, because the mean of its divisors is an integer number (700760602470).

Almost surely, 2^{1401521204939} is an apocalyptic number.

1401521204939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401521204939 is an equidigital number, since it uses as much as digits as its factorization.

1401521204939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 1401521204939 in words is "one trillion, four hundred one billion, five hundred twenty-one million, two hundred four thousand, nine hundred thirty-nine".