1551004 has 24 divisors (see below), whose sum is σ = 3341408. Its totient is φ = 613440.

The previous prime is 1551001. The next prime is 1551013. The reversal of 1551004 is 4001551.

It is a happy number.

It is a super-2 number, since 2×1551004² = 4811226816032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551001) 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, 1767 + ... + 2494.

2^1551004 is an apocalyptic number.

1551004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1551004 is an abundant number, since it is smaller than the sum of its proper divisors (1790404).

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

1551004 is a wasteful number, since it uses less digits than its factorization.

1551004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4285 (or 4283 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1551004 is about 1245.3931106281. The cubic root of 1551004 is about 115.7544349396.

Adding to 1551004 its reverse (4001551), we get a palindrome (5552555).

The spelling of 1551004 in words is "one million, five hundred fifty-one thousand, four".