1621472049 has 12 divisors (see below), whose sum is σ = 2380522612. Its totient is φ = 1063260000.

The previous prime is 1621472023. The next prime is 1621472051. The reversal of 1621472049 is 9402741261.

It is a happy number.

1621472049 is a `hidden beast` number, since 1 + 621 + 4 + 7 + 20 + 4 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 315950625 + 1305521424 = 17775^2 + 36132^2 .

It is not a de Polignac number, because 1621472049 - 2¹⁶ = 1621406513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1621472249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1476202 + ... + 1477299.

Almost surely, 2^1621472049 is an apocalyptic number.

It is an amenable number.

1621472049 is a deficient number, since it is larger than the sum of its proper divisors (759050563).

1621472049 is a wasteful number, since it uses less digits than its factorization.

1621472049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953568 (or 2953565 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1621472049 is about 40267.5061184573. The cubic root of 1621472049 is about 1174.8159178047.

The spelling of 1621472049 in words is "one billion, six hundred twenty-one million, four hundred seventy-two thousand, forty-nine".