1371551 has 2 divisors, whose sum is σ = 1371552. Its totient is φ = 1371550.

The previous prime is 1371541. The next prime is 1371563. The reversal of 1371551 is 1551731.

It is a weak prime.

It is an emirp because it is prime and its reverse (1551731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1371551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1371511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685775 + 685776.

It is an arithmetic number, because the mean of its divisors is an integer number (685776).

2^1371551 is an apocalyptic number.

1371551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371551 is an equidigital number, since it uses as much as digits as its factorization.

1371551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 525, while the sum is 23.

The square root of 1371551 is about 1171.1323580194. The cubic root of 1371551 is about 111.1059508344.

The spelling of 1371551 in words is "one million, three hundred seventy-one thousand, five hundred fifty-one".