1372661 has 2 divisors, whose sum is σ = 1372662. Its totient is φ = 1372660.

The previous prime is 1372633. The next prime is 1372667. The reversal of 1372661 is 1662731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 498436 = 935^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372661 - 2¹⁸ = 1110517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1372661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372667) 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 as a sum of consecutive naturals, namely, 686330 + 686331.

It is an arithmetic number, because the mean of its divisors is an integer number (686331).

2^1372661 is an apocalyptic number.

It is an amenable number.

1372661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372661 is an equidigital number, since it uses as much as digits as its factorization.

1372661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 26.

The square root of 1372661 is about 1171.6061624966. The cubic root of 1372661 is about 111.1359155363.

The spelling of 1372661 in words is "one million, three hundred seventy-two thousand, six hundred sixty-one".