1292401128 has 32 divisors (see below), whose sum is σ = 3401056800. Its totient is φ = 408126528.

The previous prime is 1292401111. The next prime is 1292401189. The reversal of 1292401128 is 8211042921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1292401095 and 1292401104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1416651 + ... + 1417562.

It is an arithmetic number, because the mean of its divisors is an integer number (106283025).

Almost surely, 2^1292401128 is an apocalyptic number.

It is an amenable number.

1292401128 is an abundant number, since it is smaller than the sum of its proper divisors (2108655672).

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

1292401128 is a wasteful number, since it uses less digits than its factorization.

1292401128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834241 (or 2834237 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1292401128 is about 35949.9809179365. The cubic root of 1292401128 is about 1089.2622249815.

The spelling of 1292401128 in words is "one billion, two hundred ninety-two million, four hundred one thousand, one hundred twenty-eight".