11421957 has 8 divisors (see below), whose sum is σ = 15252160. Its totient is φ = 7603200.

The previous prime is 11421953. The next prime is 11421967. The reversal of 11421957 is 75912411.

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

It is not a de Polignac number, because 11421957 - 2² = 11421953 is a prime.

It is a super-2 number, since 2×11421957² = 260922203419698, which contains 22 as substring.

It is a Duffinian number.

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 in 7 ways as a sum of consecutive naturals, for example, 169 + ... + 4782.

It is an arithmetic number, because the mean of its divisors is an integer number (1906520).

Almost surely, 2^11421957 is an apocalyptic number.

It is an amenable number.

11421957 is a deficient number, since it is larger than the sum of its proper divisors (3830203).

11421957 is an equidigital number, since it uses as much as digits as its factorization.

11421957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723.

The product of its digits is 2520, while the sum is 30.

The square root of 11421957 is about 3379.6385901454. The cubic root of 11421957 is about 225.2061123667.

The spelling of 11421957 in words is "eleven million, four hundred twenty-one thousand, nine hundred fifty-seven".