1397431802126 has 4 divisors (see below), whose sum is σ = 2096147703192. Its totient is φ = 698715901062.

The previous prime is 1397431802113. The next prime is 1397431802183. The reversal of 1397431802126 is 6212081347931.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349357950530 + ... + 349357950533.

It is an arithmetic number, because the mean of its divisors is an integer number (524036925798).

Almost surely, 2^{1397431802126} is an apocalyptic number.

1397431802126 is a deficient number, since it is larger than the sum of its proper divisors (698715901066).

1397431802126 is an equidigital number, since it uses as much as digits as its factorization.

1397431802126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698715901065.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 1397431802126 in words is "one trillion, three hundred ninety-seven billion, four hundred thirty-one million, eight hundred two thousand, one hundred twenty-six".