1292125387 has 8 divisors (see below), whose sum is σ = 1483715072. Its totient is φ = 1102285800.

The previous prime is 1292125357. The next prime is 1292125397. The reversal of 1292125387 is 7835212921.

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

It is not a de Polignac number, because 1292125387 - 2¹⁵ = 1292092619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1292125337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435939 + ... + 438892.

It is an arithmetic number, because the mean of its divisors is an integer number (185464384).

Almost surely, 2^1292125387 is an apocalyptic number.

1292125387 is a deficient number, since it is larger than the sum of its proper divisors (191589685).

1292125387 is an equidigital number, since it uses as much as digits as its factorization.

1292125387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875049.

The product of its digits is 60480, while the sum is 40.

The square root of 1292125387 is about 35946.1456487340. The cubic root of 1292125387 is about 1089.1847527447.

The spelling of 1292125387 in words is "one billion, two hundred ninety-two million, one hundred twenty-five thousand, three hundred eighty-seven".