4152021397 has 4 divisors (see below), whose sum is σ = 4152224736. Its totient is φ = 4151818060.

The previous prime is 4152021389. The next prime is 4152021409. The reversal of 4152021397 is 7931202514.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4152021397 - 2³ = 4152021389 is a prime.

It is a super-2 number, since 2×4152021397² = 34478563362291663218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4152021347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67129 + ... + 113182.

It is an arithmetic number, because the mean of its divisors is an integer number (1038056184).

Almost surely, 2^4152021397 is an apocalyptic number.

It is an amenable number.

4152021397 is a deficient number, since it is larger than the sum of its proper divisors (203339).

4152021397 is a wasteful number, since it uses less digits than its factorization.

4152021397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203338.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 4152021397 is about 64436.1808070590. The cubic root of 4152021397 is about 1607.2614474921.

The spelling of 4152021397 in words is "four billion, one hundred fifty-two million, twenty-one thousand, three hundred ninety-seven".