1151778 has 16 divisors (see below), whose sum is σ = 2328480. Its totient is φ = 379776.

The previous prime is 1151753. The next prime is 1151779. The reversal of 1151778 is 8771511.

It is a happy number.

It is a super-2 number, since 2×1151778² = 2653185122568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1151779) 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, 408 + ... + 1571.

It is an arithmetic number, because the mean of its divisors is an integer number (145530).

2^1151778 is an apocalyptic number.

1151778 is an abundant number, since it is smaller than the sum of its proper divisors (1176702).

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

1151778 is a wasteful number, since it uses less digits than its factorization.

1151778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081.

The product of its digits is 1960, while the sum is 30.

The square root of 1151778 is about 1073.2092060731. The cubic root of 1151778 is about 104.8229214863.

The spelling of 1151778 in words is "one million, one hundred fifty-one thousand, seven hundred seventy-eight".