1551242 has 24 divisors (see below), whose sum is σ = 2954880. Its totient is φ = 603960.

The previous prime is 1551241. The next prime is 1551269. The reversal of 1551242 is 2421551.

It is not an unprimeable number, because it can be changed into a prime (1551241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359 + ... + 1797.

It is an arithmetic number, because the mean of its divisors is an integer number (123120).

2^1551242 is an apocalyptic number.

1551242 is a deficient number, since it is larger than the sum of its proper divisors (1403638).

1551242 is a wasteful number, since it uses less digits than its factorization.

1551242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 1459 counting only the distinct ones).

The product of its digits is 400, while the sum is 20.

The square root of 1551242 is about 1245.4886591214. The cubic root of 1551242 is about 115.7603554373.

Adding to 1551242 its reverse (2421551), we get a palindrome (3972793).

It can be divided in two parts, 155 and 1242, that multiplied together give a triangular number (192510 = T₆₂₀).

The spelling of 1551242 in words is "one million, five hundred fifty-one thousand, two hundred forty-two".