1149978 has 16 divisors (see below), whose sum is σ = 2318400. Its totient is φ = 380256.

The previous prime is 1149971. The next prime is 1149979. The reversal of 1149978 is 8799411.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1149971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123 + ... + 1521.

It is an arithmetic number, because the mean of its divisors is an integer number (144900).

2^1149978 is an apocalyptic number.

1149978 is an abundant number, since it is smaller than the sum of its proper divisors (1168422).

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

1149978 is a wasteful number, since it uses less digits than its factorization.

1149978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541.

The product of its digits is 18144, while the sum is 39.

The square root of 1149978 is about 1072.3702718744. The cubic root of 1149978 is about 104.7682872210.

The spelling of 1149978 in words is "one million, one hundred forty-nine thousand, nine hundred seventy-eight".