1421602557 has 16 divisors (see below), whose sum is σ = 1970913792. Its totient is φ = 910460160.

The previous prime is 1421602547. The next prime is 1421602643. The reversal of 1421602557 is 7552061241.

It is not a de Polignac number, because 1421602557 - 2¹² = 1421598461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421602537) 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, 43048 + ... + 68529.

It is an arithmetic number, because the mean of its divisors is an integer number (123182112).

Almost surely, 2^1421602557 is an apocalyptic number.

It is an amenable number.

1421602557 is a deficient number, since it is larger than the sum of its proper divisors (549311235).

1421602557 is a wasteful number, since it uses less digits than its factorization.

1421602557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111748.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 1421602557 is about 37704.1450904274. The cubic root of 1421602557 is about 1124.4135365020.

Adding to 1421602557 its reverse (7552061241), we get a palindrome (8973663798).

The spelling of 1421602557 in words is "one billion, four hundred twenty-one million, six hundred two thousand, five hundred fifty-seven".