1551916 has 12 divisors (see below), whose sum is σ = 2725632. Its totient is φ = 773168.

The previous prime is 1551911. The next prime is 1551917. The reversal of 1551916 is 6191551.

It is not an unprimeable number, because it can be changed into a prime (1551911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1026 + ... + 2038.

It is an arithmetic number, because the mean of its divisors is an integer number (227136).

2^1551916 is an apocalyptic number.

It is an amenable number.

1551916 is a deficient number, since it is larger than the sum of its proper divisors (1173716).

1551916 is a wasteful number, since it uses less digits than its factorization.

1551916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400 (or 1398 counting only the distinct ones).

The product of its digits is 1350, while the sum is 28.

The square root of 1551916 is about 1245.7592062674. The cubic root of 1551916 is about 115.7771186034. Note that the first 3 decimals are identical.

The spelling of 1551916 in words is "one million, five hundred fifty-one thousand, nine hundred sixteen".