1551497 has 2 divisors, whose sum is σ = 1551498. Its totient is φ = 1551496.

The previous prime is 1551479. The next prime is 1551499. The reversal of 1551497 is 7941551.

Together with previous prime (1551479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1485961 + 65536 = 1219^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551497 - 2⁸ = 1551241 is a prime.

Together with 1551499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1551499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775748 + 775749.

It is an arithmetic number, because the mean of its divisors is an integer number (775749).

2^1551497 is an apocalyptic number.

It is an amenable number.

1551497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551497 is an equidigital number, since it uses as much as digits as its factorization.

1551497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 32.

The square root of 1551497 is about 1245.5910243736. The cubic root of 1551497 is about 115.7666981556.

It can be divided in two parts, 1551 and 497, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1551497 in words is "one million, five hundred fifty-one thousand, four hundred ninety-seven".