1551648 has 48 divisors (see below), whose sum is σ = 4656960. Its totient is φ = 443136.

The previous prime is 1551647. The next prime is 1551659. The reversal of 1551648 is 8461551.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1551648² = 4815223031808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1551647) 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, 483 + ... + 1826.

It is an arithmetic number, because the mean of its divisors is an integer number (97020).

2^1551648 is an apocalyptic number.

It is an amenable number.

1551648 is an abundant number, since it is smaller than the sum of its proper divisors (3105312).

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

1551648 is a wasteful number, since it uses less digits than its factorization.

1551648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329 (or 2321 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 1551648 is about 1245.6516366946. The cubic root of 1551648 is about 115.7704537122.

Subtracting 1551648 from its reverse (8461551), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1551648 in words is "one million, five hundred fifty-one thousand, six hundred forty-eight".