1242154 has 8 divisors (see below), whose sum is σ = 1867968. Its totient is φ = 619500.

The previous prime is 1242151. The next prime is 1242167. The reversal of 1242154 is 4512421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1242151) 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, 1089 + ... + 1915.

It is an arithmetic number, because the mean of its divisors is an integer number (233496).

2^1242154 is an apocalyptic number.

1242154 is a deficient number, since it is larger than the sum of its proper divisors (625814).

1242154 is an equidigital number, since it uses as much as digits as its factorization.

1242154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580.

The product of its digits is 320, while the sum is 19.

The square root of 1242154 is about 1114.5196274629. The cubic root of 1242154 is about 107.4958786954.

Adding to 1242154 its reverse (4512421), we get a palindrome (5754575).

It can be divided in two parts, 124 and 2154, that added together give a triangular number (2278 = T₆₇).

The spelling of 1242154 in words is "one million, two hundred forty-two thousand, one hundred fifty-four".