1421240553 has 8 divisors (see below), whose sum is σ = 2105541600. Its totient is φ = 947493684.

The previous prime is 1421240551. The next prime is 1421240609. The reversal of 1421240553 is 3550421241.

It is not a de Polignac number, because 1421240553 - 2¹ = 1421240551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 52638539 = 1421240553 / (1 + 4 + 2 + 1 + 2 + 4 + 0 + 5 + 5 + 3).

It is not an unprimeable number, because it can be changed into a prime (1421240551) 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, 26319243 + ... + 26319296.

It is an arithmetic number, because the mean of its divisors is an integer number (263192700).

Almost surely, 2^1421240553 is an apocalyptic number.

It is an amenable number.

1421240553 is a deficient number, since it is larger than the sum of its proper divisors (684301047).

1421240553 is an equidigital number, since it uses as much as digits as its factorization.

1421240553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52638548 (or 52638542 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1421240553 is about 37699.3441985401. The cubic root of 1421240553 is about 1124.3180863001.

Adding to 1421240553 its reverse (3550421241), we get a palindrome (4971661794).

The spelling of 1421240553 in words is "one billion, four hundred twenty-one million, two hundred forty thousand, five hundred fifty-three".