1400142121 has 16 divisors (see below), whose sum is σ = 1636502400. Its totient is φ = 1197414960.

The previous prime is 1400142119. The next prime is 1400142131. The reversal of 1400142121 is 1212410041.

It is a happy number.

It is not a de Polignac number, because 1400142121 - 2¹ = 1400142119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400142095 and 1400142104.

It is not an unprimeable number, because it can be changed into a prime (1400142101) 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, 155811 + ... + 164551.

It is an arithmetic number, because the mean of its divisors is an integer number (102281400).

Almost surely, 2^1400142121 is an apocalyptic number.

It is an amenable number.

1400142121 is a deficient number, since it is larger than the sum of its proper divisors (236360279).

1400142121 is an frugal number, since it uses more digits than its factorization.

1400142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9229 (or 9215 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1400142121 is about 37418.4729912913. The cubic root of 1400142121 is about 1118.7267953699.

Adding to 1400142121 its reverse (1212410041), we get a palindrome (2612552162).

The spelling of 1400142121 in words is "one billion, four hundred million, one hundred forty-two thousand, one hundred twenty-one".