1961154 has 72 divisors (see below), whose sum is σ = 5028660. Its totient is φ = 548352.

The previous prime is 1961147. The next prime is 1961173. The reversal of 1961154 is 4511691.

It can be written as a sum of positive squares in 6 ways, for example, as 1199025 + 762129 = 1095^2 + 873^2 .

It is a super-2 number, since 2×1961154² = 7692250023432, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 67612 + ... + 67640.

2^1961154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1961154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2514330).

1961154 is an abundant number, since it is smaller than the sum of its proper divisors (3067506).

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

1961154 is a wasteful number, since it uses less digits than its factorization.

1961154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 64 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 1961154 is about 1400.4120822101. The cubic root of 1961154 is about 125.1710511586.

The spelling of 1961154 in words is "one million, nine hundred sixty-one thousand, one hundred fifty-four".