1290825101 has 4 divisors (see below), whose sum is σ = 1292147292. Its totient is φ = 1289502912.

The previous prime is 1290825091. The next prime is 1290825131. The reversal of 1290825101 is 1015280921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1128288100 + 162537001 = 33590^2 + 12749^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290825101 - 2⁶ = 1290825037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290825131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659630 + ... + 661583.

It is an arithmetic number, because the mean of its divisors is an integer number (323036823).

Almost surely, 2^1290825101 is an apocalyptic number.

It is an amenable number.

1290825101 is a deficient number, since it is larger than the sum of its proper divisors (1322191).

1290825101 is an equidigital number, since it uses as much as digits as its factorization.

1290825101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322190.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 1290825101 is about 35928.0545117600. The cubic root of 1290825101 is about 1088.8192755676.

The spelling of 1290825101 in words is "one billion, two hundred ninety million, eight hundred twenty-five thousand, one hundred one".