1290061902 has 8 divisors (see below), whose sum is σ = 2580123816. Its totient is φ = 430020632.

The previous prime is 1290061889. The next prime is 1290061909. The reversal of 1290061902 is 2091600921.

It is a happy number.

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

1290061902 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1290061902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290061909) 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, 107505153 + ... + 107505164.

It is an arithmetic number, because the mean of its divisors is an integer number (322515477).

Almost surely, 2^1290061902 is an apocalyptic number.

1290061902 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1290061902 is a wasteful number, since it uses less digits than its factorization.

1290061902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215010322.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1290061902 is about 35917.4317288973. The cubic root of 1290061902 is about 1088.6046455070.

The spelling of 1290061902 in words is "one billion, two hundred ninety million, sixty-one thousand, nine hundred two".