1397426451 has 16 divisors (see below), whose sum is σ = 1928962560. Its totient is φ = 898803360.

The previous prime is 1397426417. The next prime is 1397426453. The reversal of 1397426451 is 1546247931.

It is not a de Polignac number, because 1397426451 - 2¹¹ = 1397424403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1397426453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123606 + ... + 134436.

It is an arithmetic number, because the mean of its divisors is an integer number (120560160).

Almost surely, 2^1397426451 is an apocalyptic number.

1397426451 is a deficient number, since it is larger than the sum of its proper divisors (531536109).

1397426451 is a wasteful number, since it uses less digits than its factorization.

1397426451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12346.

The product of its digits is 181440, while the sum is 42.

The square root of 1397426451 is about 37382.1675535274. The cubic root of 1397426451 is about 1118.0030452435.

The spelling of 1397426451 in words is "one billion, three hundred ninety-seven million, four hundred twenty-six thousand, four hundred fifty-one".