1290321402 has 16 divisors (see below), whose sum is σ = 2582707680. Its totient is φ = 429762992.

The previous prime is 1290321353. The next prime is 1290321421. The reversal of 1290321402 is 2041230921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77853 + ... + 92960.

It is an arithmetic number, because the mean of its divisors is an integer number (161419230).

Almost surely, 2^1290321402 is an apocalyptic number.

1290321402 is an abundant number, since it is smaller than the sum of its proper divisors (1292386278).

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

1290321402 is a wasteful number, since it uses less digits than its factorization.

1290321402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172077.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1290321402 is about 35921.0439993049. The cubic root of 1290321402 is about 1088.6776326935.

The spelling of 1290321402 in words is "one billion, two hundred ninety million, three hundred twenty-one thousand, four hundred two".