1252151987 has 2 divisors, whose sum is σ = 1252151988. Its totient is φ = 1252151986.

The previous prime is 1252151963. The next prime is 1252152007. The reversal of 1252151987 is 7891512521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1252151987 - 2¹² = 1252147891 is a prime.

It is not a weakly prime, because it can be changed into another prime (1252151917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626075993 + 626075994.

It is an arithmetic number, because the mean of its divisors is an integer number (626075994).

Almost surely, 2^1252151987 is an apocalyptic number.

1252151987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252151987 is an equidigital number, since it uses as much as digits as its factorization.

1252151987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 41.

The square root of 1252151987 is about 35385.7596640230. The cubic root of 1252151987 is about 1077.8351659994.

The spelling of 1252151987 in words is "one billion, two hundred fifty-two million, one hundred fifty-one thousand, nine hundred eighty-seven".