1551269 has 2 divisors, whose sum is σ = 1551270. Its totient is φ = 1551268.

The previous prime is 1551241. The next prime is 1551289. The reversal of 1551269 is 9621551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113025 + 438244 = 1055^2 + 662^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551269 - 2⁸ = 1551013 is a prime.

It is a super-2 number, since 2×1551269² = 4812871020722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551229) 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, 775634 + 775635.

It is an arithmetic number, because the mean of its divisors is an integer number (775635).

2^1551269 is an apocalyptic number.

It is an amenable number.

1551269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551269 is an equidigital number, since it uses as much as digits as its factorization.

1551269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 29.

The square root of 1551269 is about 1245.4994981934. The cubic root of 1551269 is about 115.7610270521.

The spelling of 1551269 in words is "one million, five hundred fifty-one thousand, two hundred sixty-nine".