1254122157 has 8 divisors (see below), whose sum is σ = 1674329184. Its totient is φ = 834998288.

The previous prime is 1254122137. The next prime is 1254122161. The reversal of 1254122157 is 7512214521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1254122157 - 2⁷ = 1254122029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254122137) 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 in 7 ways as a sum of consecutive naturals, for example, 268083 + ... + 272720.

It is an arithmetic number, because the mean of its divisors is an integer number (209291148).

Almost surely, 2^1254122157 is an apocalyptic number.

It is an amenable number.

1254122157 is a deficient number, since it is larger than the sum of its proper divisors (420207027).

1254122157 is an equidigital number, since it uses as much as digits as its factorization.

1254122157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541579.

The product of its digits is 5600, while the sum is 30.

The square root of 1254122157 is about 35413.5871806288. The cubic root of 1254122157 is about 1078.4001681636.

Adding to 1254122157 its reverse (7512214521), we get a palindrome (8766336678).

The spelling of 1254122157 in words is "one billion, two hundred fifty-four million, one hundred twenty-two thousand, one hundred fifty-seven".