11421958 has 4 divisors (see below), whose sum is σ = 17132940. Its totient is φ = 5710978.

The previous prime is 11421953. The next prime is 11421967. The reversal of 11421958 is 85912411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85912411 = 13 ⋅6608647.

It is a super-2 number, since 2×11421958² = 260922249107528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2855488 + ... + 2855491.

It is an arithmetic number, because the mean of its divisors is an integer number (4283235).

Almost surely, 2^11421958 is an apocalyptic number.

11421958 is a deficient number, since it is larger than the sum of its proper divisors (5710982).

11421958 is an equidigital number, since it uses as much as digits as its factorization.

11421958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5710981.

The product of its digits is 2880, while the sum is 31.

The square root of 11421958 is about 3379.6387380902. The cubic root of 11421958 is about 225.2061189390.

The spelling of 11421958 in words is "eleven million, four hundred twenty-one thousand, nine hundred fifty-eight".