1535421004 has 48 divisors (see below), whose sum is σ = 2963520000. Its totient is φ = 691638336.

The previous prime is 1535420993. The next prime is 1535421007. The reversal of 1535421004 is 4001245351.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1535421004.

It is not an unprimeable number, because it can be changed into a prime (1535421007) 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, 1218927 + ... + 1220185.

It is an arithmetic number, because the mean of its divisors is an integer number (61740000).

Almost surely, 2^1535421004 is an apocalyptic number.

It is an amenable number.

1535421004 is a deficient number, since it is larger than the sum of its proper divisors (1428098996).

1535421004 is a wasteful number, since it uses less digits than its factorization.

1535421004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1820 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1535421004 is about 39184.4484968208. The cubic root of 1535421004 is about 1153.6546628988.

Adding to 1535421004 its reverse (4001245351), we get a palindrome (5536666355).

The spelling of 1535421004 in words is "one billion, five hundred thirty-five million, four hundred twenty-one thousand, four".