1551942 has 48 divisors (see below), whose sum is σ = 3912480. Its totient is φ = 435456.

The previous prime is 1551929. The next prime is 1551943. The reversal of 1551942 is 2491551.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13678 + ... + 13790.

It is an arithmetic number, because the mean of its divisors is an integer number (81510).

2^1551942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1956240).

1551942 is an abundant number, since it is smaller than the sum of its proper divisors (2360538).

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

1551942 is a wasteful number, since it uses less digits than its factorization.

1551942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 234 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1551942 is about 1245.7696416272. The cubic root of 1551942 is about 115.7777651565. Note that the first 4 decimals are identical.

The spelling of 1551942 in words is "one million, five hundred fifty-one thousand, nine hundred forty-two".