40148121 has 16 divisors (see below), whose sum is σ = 60683840. Its totient is φ = 23405760.

The previous prime is 40148117. The next prime is 40148123. The reversal of 40148121 is 12184104.

It is a happy number.

It is not a de Polignac number, because 40148121 - 2² = 40148117 is a prime.

It is a super-2 number, since 2×40148121² = 3223743239661282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40148123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26350 + ... + 27831.

It is an arithmetic number, because the mean of its divisors is an integer number (3792740).

Almost surely, 2^40148121 is an apocalyptic number.

It is an amenable number.

40148121 is a deficient number, since it is larger than the sum of its proper divisors (20535719).

40148121 is a wasteful number, since it uses less digits than its factorization.

40148121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54216.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 40148121 is about 6336.2544929951. The cubic root of 40148121 is about 342.4168082530.

The spelling of 40148121 in words is "forty million, one hundred forty-eight thousand, one hundred twenty-one".