1512172147 has 2 divisors, whose sum is σ = 1512172148. Its totient is φ = 1512172146.

The previous prime is 1512172073. The next prime is 1512172153. The reversal of 1512172147 is 7412712151.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1512172147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1512172547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756086073 + 756086074.

It is an arithmetic number, because the mean of its divisors is an integer number (756086074).

Almost surely, 2^1512172147 is an apocalyptic number.

1512172147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1512172147 is an equidigital number, since it uses as much as digits as its factorization.

1512172147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 31.

The square root of 1512172147 is about 38886.6576990103. The cubic root of 1512172147 is about 1147.8022669210.

Adding to 1512172147 its reverse (7412712151), we get a palindrome (8924884298).

The spelling of 1512172147 in words is "one billion, five hundred twelve million, one hundred seventy-two thousand, one hundred forty-seven".