1401571397 has 2 divisors, whose sum is σ = 1401571398. Its totient is φ = 1401571396.

The previous prime is 1401571393. The next prime is 1401571403. The reversal of 1401571397 is 7931751041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1310005636 + 91565761 = 36194^2 + 9569^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401571397 - 2² = 1401571393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1401571397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401571393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700785698 + 700785699.

It is an arithmetic number, because the mean of its divisors is an integer number (700785699).

Almost surely, 2^1401571397 is an apocalyptic number.

It is an amenable number.

1401571397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401571397 is an equidigital number, since it uses as much as digits as its factorization.

1401571397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 1401571397 is about 37437.5666543647. The cubic root of 1401571397 is about 1119.1073342603.

The spelling of 1401571397 in words is "one billion, four hundred one million, five hundred seventy-one thousand, three hundred ninety-seven".