1202140421 has 8 divisors (see below), whose sum is σ = 1221039960. Its totient is φ = 1183306752.

The previous prime is 1202140417. The next prime is 1202140427. The reversal of 1202140421 is 1240412021.

It can be written as a sum of positive squares in 4 ways, for example, as 630261025 + 571879396 = 25105^2 + 23914^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1202140421 - 2² = 1202140417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1202140421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202140427) 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, 20981 + ... + 53333.

It is an arithmetic number, because the mean of its divisors is an integer number (152629995).

Almost surely, 2^1202140421 is an apocalyptic number.

It is an amenable number.

1202140421 is a deficient number, since it is larger than the sum of its proper divisors (18899539).

1202140421 is an equidigital number, since it uses as much as digits as its factorization.

1202140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32935.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1202140421 is about 34671.8967032379. The cubic root of 1202140421 is about 1063.2900096560.

Adding to 1202140421 its reverse (1240412021), we get a palindrome (2442552442).

The spelling of 1202140421 in words is "one billion, two hundred two million, one hundred forty thousand, four hundred twenty-one".