15401442 has 16 divisors (see below), whose sum is σ = 35203392. Its totient is φ = 4400400.

The previous prime is 15401431. The next prime is 15401453. The reversal of 15401442 is 24410451.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15401431) and next prime (15401453).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183309 + ... + 183392.

It is an arithmetic number, because the mean of its divisors is an integer number (2200212).

Almost surely, 2^15401442 is an apocalyptic number.

15401442 is an abundant number, since it is smaller than the sum of its proper divisors (19801950).

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

15401442 is a wasteful number, since it uses less digits than its factorization.

15401442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366713.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 15401442 is about 3924.4670975815. The cubic root of 15401442 is about 248.8019586251.

Adding to 15401442 its reverse (24410451), we get a palindrome (39811893).

Subtracting 15401442 from its reverse (24410451), we obtain a palindrome (9009009).

The spelling of 15401442 in words is "fifteen million, four hundred one thousand, four hundred forty-two".