1400235161 has 4 divisors (see below), whose sum is σ = 1507945572. Its totient is φ = 1292524752.

The previous prime is 1400235127. The next prime is 1400235167. The reversal of 1400235161 is 1615320041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1615320041 = 5867 ⋅275323.

It can be written as a sum of positive squares in 2 ways, for example, as 108264025 + 1291971136 = 10405^2 + 35944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400235161 - 2⁶ = 1400235097 is a prime.

It is a super-2 number, since 2×1400235161² = 3921317012201391842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1400235167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53855186 + ... + 53855211.

It is an arithmetic number, because the mean of its divisors is an integer number (376986393).

Almost surely, 2^1400235161 is an apocalyptic number.

It is an amenable number.

1400235161 is a deficient number, since it is larger than the sum of its proper divisors (107710411).

1400235161 is a wasteful number, since it uses less digits than its factorization.

1400235161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107710410.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1400235161 is about 37419.7162068341. The cubic root of 1400235161 is about 1118.7515747676.

The spelling of 1400235161 in words is "one billion, four hundred million, two hundred thirty-five thousand, one hundred sixty-one".