1551125417 has 2 divisors, whose sum is σ = 1551125418. Its totient is φ = 1551125416.

The previous prime is 1551125357. The next prime is 1551125431. The reversal of 1551125417 is 7145211551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1227521296 + 323604121 = 35036^2 + 17989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551125417 - 2²⁰ = 1550076841 is a prime.

It is not a weakly prime, because it can be changed into another prime (1551125447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775562708 + 775562709.

It is an arithmetic number, because the mean of its divisors is an integer number (775562709).

Almost surely, 2^1551125417 is an apocalyptic number.

It is an amenable number.

1551125417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551125417 is an equidigital number, since it uses as much as digits as its factorization.

1551125417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7000, while the sum is 32.

The square root of 1551125417 is about 39384.3295867785. The cubic root of 1551125417 is about 1157.5745538950.

Adding to 1551125417 its reverse (7145211551), we get a palindrome (8696336968).

The spelling of 1551125417 in words is "one billion, five hundred fifty-one million, one hundred twenty-five thousand, four hundred seventeen".