1161428 has 12 divisors (see below), whose sum is σ = 2052960. Its totient is φ = 574872.

The previous prime is 1161403. The next prime is 1161437. The reversal of 1161428 is 8241611.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998 + ... + 1821.

It is an arithmetic number, because the mean of its divisors is an integer number (171080).

2^1161428 is an apocalyptic number.

It is an amenable number.

1161428 is a deficient number, since it is larger than the sum of its proper divisors (891532).

1161428 is a wasteful number, since it uses less digits than its factorization.

1161428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926 (or 2924 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 1161428 is about 1077.6956898865. The cubic root of 1161428 is about 105.1148554219.

The spelling of 1161428 in words is "one million, one hundred sixty-one thousand, four hundred twenty-eight".