1292252387 has 2 divisors, whose sum is σ = 1292252388. Its totient is φ = 1292252386.

The previous prime is 1292252371. The next prime is 1292252393. The reversal of 1292252387 is 7832522921.

It is a strong prime.

It is an emirp because it is prime and its reverse (7832522921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1292252387 - 2⁴ = 1292252371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1292212387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646126193 + 646126194.

It is an arithmetic number, because the mean of its divisors is an integer number (646126194).

Almost surely, 2^1292252387 is an apocalyptic number.

1292252387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1292252387 is an equidigital number, since it uses as much as digits as its factorization.

1292252387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 1292252387 is about 35947.9121368683. The cubic root of 1292252387 is about 1089.2204360546.

The spelling of 1292252387 in words is "one billion, two hundred ninety-two million, two hundred fifty-two thousand, three hundred eighty-seven".