1511994 has 32 divisors (see below), whose sum is σ = 3409920. Its totient is φ = 442800.

The previous prime is 1511977. The next prime is 1511999. The reversal of 1511994 is 4991151.

It is a super-2 number, since 2×1511994² = 4572251712072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1511999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1677 + ... + 2415.

It is an arithmetic number, because the mean of its divisors is an integer number (106560).

2^1511994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1511994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1704960).

1511994 is an abundant number, since it is smaller than the sum of its proper divisors (1897926).

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

1511994 is a wasteful number, since it uses less digits than its factorization.

1511994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786.

The product of its digits is 1620, while the sum is 30.

The square root of 1511994 is about 1229.6316521625. The cubic root of 1511994 is about 114.7757191462.

It can be divided in two parts, 151 and 1994, that added together give a triangular number (2145 = T₆₅).

The spelling of 1511994 in words is "one million, five hundred eleven thousand, nine hundred ninety-four".